164347831 has 2 divisors, whose sum is σ = 164347832. Its totient is φ = 164347830.

The previous prime is 164347829. The next prime is 164347867. The reversal of 164347831 is 138743461.

It is a weak prime.

It is an emirp because it is prime and its reverse (138743461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164347831 - 2¹ = 164347829 is a prime.

It is a super-2 number, since 2×164347831² = 54020419108809122, which contains 22 as substring.

Together with 164347829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164347871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82173915 + 82173916.

It is an arithmetic number, because the mean of its divisors is an integer number (82173916).

Almost surely, 2^164347831 is an apocalyptic number.

164347831 is a deficient number, since it is larger than the sum of its proper divisors (1).

164347831 is an equidigital number, since it uses as much as digits as its factorization.

164347831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 164347831 is about 12819.8218006336. The cubic root of 164347831 is about 547.7570706064.

The spelling of 164347831 in words is "one hundred sixty-four million, three hundred forty-seven thousand, eight hundred thirty-one".