64673137 has 2 divisors, whose sum is σ = 64673138. Its totient is φ = 64673136.

The previous prime is 64673123. The next prime is 64673221. The reversal of 64673137 is 73137646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41977441 + 22695696 = 6479^2 + 4764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64673137 is a prime.

It is a super-2 number, since 2×64673137² = 8365229298841538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64673096 and 64673105.

It is not a weakly prime, because it can be changed into another prime (64673437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32336568 + 32336569.

It is an arithmetic number, because the mean of its divisors is an integer number (32336569).

Almost surely, 2^64673137 is an apocalyptic number.

It is an amenable number.

64673137 is a deficient number, since it is larger than the sum of its proper divisors (1).

64673137 is an equidigital number, since it uses as much as digits as its factorization.

64673137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 37.

The square root of 64673137 is about 8041.9610170654. The cubic root of 64673137 is about 401.3974806835.

It can be divided in two parts, 6467 and 3137, that added together give a square (9604 = 98²).

The spelling of 64673137 in words is "sixty-four million, six hundred seventy-three thousand, one hundred thirty-seven".