37972565 has 4 divisors (see below), whose sum is σ = 45567084. Its totient is φ = 30378048.

The previous prime is 37972549. The next prime is 37972567. The reversal of 37972565 is 56527973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56527973 = 31 ⋅1823483.

It can be written as a sum of positive squares in 2 ways, for example, as 22676644 + 15295921 = 4762^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 37972565 - 2⁴ = 37972549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37972567) 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, 3797252 + ... + 3797261.

It is an arithmetic number, because the mean of its divisors is an integer number (11391771).

Almost surely, 2^37972565 is an apocalyptic number.

It is an amenable number.

37972565 is a deficient number, since it is larger than the sum of its proper divisors (7594519).

37972565 is an equidigital number, since it uses as much as digits as its factorization.

37972565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594518.

The product of its digits is 396900, while the sum is 44.

The square root of 37972565 is about 6162.1883288325. The cubic root of 37972565 is about 336.1166126084.

The spelling of 37972565 in words is "thirty-seven million, nine hundred seventy-two thousand, five hundred sixty-five".