61148869 has 2 divisors, whose sum is σ = 61148870. Its totient is φ = 61148868.

The previous prime is 61148863. The next prime is 61148903. The reversal of 61148869 is 96884116.

61148869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 21622500 = 6287^2 + 4650^2 .

It is a cyclic number.

It is not a de Polignac number, because 61148869 - 2⁹ = 61148357 is a prime.

It is a super-2 number, since 2×61148869² = 7478368359958322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61148863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30574434 + 30574435.

It is an arithmetic number, because the mean of its divisors is an integer number (30574435).

Almost surely, 2^61148869 is an apocalyptic number.

It is an amenable number.

61148869 is a deficient number, since it is larger than the sum of its proper divisors (1).

61148869 is an equidigital number, since it uses as much as digits as its factorization.

61148869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 61148869 is about 7819.7742294775. The cubic root of 61148869 is about 393.9696889769.

The spelling of 61148869 in words is "sixty-one million, one hundred forty-eight thousand, eight hundred sixty-nine".