609611131 has 2 divisors, whose sum is σ = 609611132. Its totient is φ = 609611130.

The previous prime is 609611111. The next prime is 609611153. The reversal of 609611131 is 131116906.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 609611131 - 2⁵ = 609611099 is a prime.

It is a super-2 number, since 2×609611131² = 743251462078198322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 609611131.

It is not a weakly prime, because it can be changed into another prime (609611111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304805565 + 304805566.

It is an arithmetic number, because the mean of its divisors is an integer number (304805566).

Almost surely, 2^609611131 is an apocalyptic number.

609611131 is a deficient number, since it is larger than the sum of its proper divisors (1).

609611131 is an equidigital number, since it uses as much as digits as its factorization.

609611131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 609611131 is about 24690.3043926153. The cubic root of 609611131 is about 847.9123536410.

The spelling of 609611131 in words is "six hundred nine million, six hundred eleven thousand, one hundred thirty-one".