164961131 has 2 divisors, whose sum is σ = 164961132. Its totient is φ = 164961130.

The previous prime is 164961119. The next prime is 164961191. The reversal of 164961131 is 131169461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164961131 is a prime.

It is a super-2 number, since 2×164961131² = 54424349481598322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164961101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82480565 + 82480566.

It is an arithmetic number, because the mean of its divisors is an integer number (82480566).

Almost surely, 2^164961131 is an apocalyptic number.

164961131 is a deficient number, since it is larger than the sum of its proper divisors (1).

164961131 is an equidigital number, since it uses as much as digits as its factorization.

164961131 is an evil number, because the sum of its binary digits is even.

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

The square root of 164961131 is about 12843.7195157789. The cubic root of 164961131 is about 548.4375833870.

The spelling of 164961131 in words is "one hundred sixty-four million, nine hundred sixty-one thousand, one hundred thirty-one".