612101491 has 2 divisors, whose sum is σ = 612101492. Its totient is φ = 612101490.

The previous prime is 612101453. The next prime is 612101527. The reversal of 612101491 is 194101216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 612101491 - 2⁷ = 612101363 is a prime.

It is not a weakly prime, because it can be changed into another prime (612101411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306050745 + 306050746.

It is an arithmetic number, because the mean of its divisors is an integer number (306050746).

Almost surely, 2^612101491 is an apocalyptic number.

612101491 is a deficient number, since it is larger than the sum of its proper divisors (1).

612101491 is an equidigital number, since it uses as much as digits as its factorization.

612101491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 612101491 is about 24740.6849339302. The cubic root of 612101491 is about 849.0654046005.

The spelling of 612101491 in words is "six hundred twelve million, one hundred one thousand, four hundred ninety-one".