37996561 has 4 divisors (see below), whose sum is σ = 39996400. Its totient is φ = 35996724.

The previous prime is 37996559. The next prime is 37996577. The reversal of 37996561 is 16569973.

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 37996561 - 2¹ = 37996559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37996501) 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, 999891 + ... + 999928.

It is an arithmetic number, because the mean of its divisors is an integer number (9999100).

Almost surely, 2^37996561 is an apocalyptic number.

It is an amenable number.

37996561 is a deficient number, since it is larger than the sum of its proper divisors (1999839).

37996561 is a wasteful number, since it uses less digits than its factorization.

37996561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999838.

The product of its digits is 306180, while the sum is 46.

The square root of 37996561 is about 6164.1350569240. The cubic root of 37996561 is about 336.1873984148.

The spelling of 37996561 in words is "thirty-seven million, nine hundred ninety-six thousand, five hundred sixty-one".