37998641 has 4 divisors (see below), whose sum is σ = 38050800. Its totient is φ = 37946484.

The previous prime is 37998637. The next prime is 37998647. The reversal of 37998641 is 14689973.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 37998641 - 2² = 37998637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37998647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24971 + ... + 26448.

It is an arithmetic number, because the mean of its divisors is an integer number (9512700).

Almost surely, 2^37998641 is an apocalyptic number.

It is an amenable number.

37998641 is a deficient number, since it is larger than the sum of its proper divisors (52159).

37998641 is an equidigital number, since it uses as much as digits as its factorization.

37998641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52158.

The product of its digits is 326592, while the sum is 47.

The square root of 37998641 is about 6164.3037725278. The cubic root of 37998641 is about 336.1935328035.

The spelling of 37998641 in words is "thirty-seven million, nine hundred ninety-eight thousand, six hundred forty-one".