37664489 has 2 divisors, whose sum is σ = 37664490. Its totient is φ = 37664488.

The previous prime is 37664461. The next prime is 37664491. The reversal of 37664489 is 98446673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 5798464 = 5645^2 + 2408^2 .

It is a cyclic number.

It is not a de Polignac number, because 37664489 - 2²⁰ = 36615913 is a prime.

It is a super-2 number, since 2×37664489² = 2837227463262242, which contains 22 as substring.

Together with 37664491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37664449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18832244 + 18832245.

It is an arithmetic number, because the mean of its divisors is an integer number (18832245).

Almost surely, 2^37664489 is an apocalyptic number.

It is an amenable number.

37664489 is a deficient number, since it is larger than the sum of its proper divisors (1).

37664489 is an equidigital number, since it uses as much as digits as its factorization.

37664489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 37664489 is about 6137.1401320159. The cubic root of 37664489 is about 335.2051583603.

The spelling of 37664489 in words is "thirty-seven million, six hundred sixty-four thousand, four hundred eighty-nine".