164786131 has 2 divisors, whose sum is σ = 164786132. Its totient is φ = 164786130.

The previous prime is 164786119. The next prime is 164786137. The reversal of 164786131 is 131687461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164786131 - 2²³ = 156397523 is a prime.

It is a super-2 number, since 2×164786131² = 54308937939898322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164786137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82393065 + 82393066.

It is an arithmetic number, because the mean of its divisors is an integer number (82393066).

Almost surely, 2^164786131 is an apocalyptic number.

164786131 is a deficient number, since it is larger than the sum of its proper divisors (1).

164786131 is an equidigital number, since it uses as much as digits as its factorization.

164786131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 164786131 is about 12836.9050397672. The cubic root of 164786131 is about 548.2435770058.

It can be divided in two parts, 1647 and 86131, that added together give a palindrome (87778).

The spelling of 164786131 in words is "one hundred sixty-four million, seven hundred eighty-six thousand, one hundred thirty-one".