61389113 has 4 divisors (see below), whose sum is σ = 61997028. Its totient is φ = 60781200.

The previous prime is 61389103. The next prime is 61389121. The reversal of 61389113 is 31198316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53699584 + 7689529 = 7328^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 61389113 - 2⁶ = 61389049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61389113.

It is not an unprimeable number, because it can be changed into a prime (61389103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303806 + ... + 304007.

It is an arithmetic number, because the mean of its divisors is an integer number (15499257).

Almost surely, 2^61389113 is an apocalyptic number.

It is an amenable number.

61389113 is a deficient number, since it is larger than the sum of its proper divisors (607915).

61389113 is a wasteful number, since it uses less digits than its factorization.

61389113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607914.

The product of its digits is 3888, while the sum is 32.

The square root of 61389113 is about 7835.1204840768. The cubic root of 61389113 is about 394.4849624508.

It can be divided in two parts, 6138 and 9113, that added together give a palindrome (15251).

The spelling of 61389113 in words is "sixty-one million, three hundred eighty-nine thousand, one hundred thirteen".