647162167 has 2 divisors, whose sum is σ = 647162168. Its totient is φ = 647162166.

The previous prime is 647162123. The next prime is 647162183. The reversal of 647162167 is 761261746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647162167 - 2¹¹ = 647160119 is a prime.

It is a super-2 number, since 2×647162167² = 837637740792271778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647162267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323581083 + 323581084.

It is an arithmetic number, because the mean of its divisors is an integer number (323581084).

Almost surely, 2^647162167 is an apocalyptic number.

647162167 is a deficient number, since it is larger than the sum of its proper divisors (1).

647162167 is an equidigital number, since it uses as much as digits as its factorization.

647162167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 647162167 is about 25439.3822055489. The cubic root of 647162167 is about 864.9766293930.

The spelling of 647162167 in words is "six hundred forty-seven million, one hundred sixty-two thousand, one hundred sixty-seven".