36937907921 has 4 divisors (see below), whose sum is σ = 39110726052. Its totient is φ = 34765089792.

The previous prime is 36937907911. The next prime is 36937907939. The reversal of 36937907921 is 12970973963.

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 12218207296 + 24719700625 = 110536^2 + 157225^2 .

It is a cyclic number.

It is not a de Polignac number, because 36937907921 - 2²⁶ = 36870799057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36937907911) 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, 1086409040 + ... + 1086409073.

It is an arithmetic number, because the mean of its divisors is an integer number (9777681513).

Almost surely, 2^36937907921 is an apocalyptic number.

It is an amenable number.

36937907921 is a deficient number, since it is larger than the sum of its proper divisors (2172818131).

36937907921 is a wasteful number, since it uses less digits than its factorization.

36937907921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172818130.

The product of its (nonzero) digits is 3857868, while the sum is 56.

The spelling of 36937907921 in words is "thirty-six billion, nine hundred thirty-seven million, nine hundred seven thousand, nine hundred twenty-one".