37942649 has 4 divisors (see below), whose sum is σ = 38968164. Its totient is φ = 36917136.

The previous prime is 37942637. The next prime is 37942669. The reversal of 37942649 is 94624973.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35617024 + 2325625 = 5968^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 37942649 - 2⁴ = 37942633 is a prime.

It is a super-2 number, since 2×37942649² = 2879289226274402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37942609) 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, 512702 + ... + 512775.

It is an arithmetic number, because the mean of its divisors is an integer number (9742041).

Almost surely, 2^37942649 is an apocalyptic number.

It is an amenable number.

37942649 is a deficient number, since it is larger than the sum of its proper divisors (1025515).

37942649 is a wasteful number, since it uses less digits than its factorization.

37942649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025514.

The product of its digits is 326592, while the sum is 44.

The square root of 37942649 is about 6159.7604661220. The cubic root of 37942649 is about 336.0283216159.

The spelling of 37942649 in words is "thirty-seven million, nine hundred forty-two thousand, six hundred forty-nine".