36921573 has 12 divisors (see below), whose sum is σ = 57433740. Its totient is φ = 22720896.

The previous prime is 36921571. The next prime is 36921581. The reversal of 36921573 is 37512963.

36921573 is a `hidden beast` number, since 3 + 69 + 21 + 573 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7306209 + 29615364 = 2703^2 + 5442^2 .

It is not a de Polignac number, because 36921573 - 2¹ = 36921571 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36921571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157668 + ... + 157901.

It is an arithmetic number, because the mean of its divisors is an integer number (4786145).

Almost surely, 2^36921573 is an apocalyptic number.

It is an amenable number.

36921573 is a deficient number, since it is larger than the sum of its proper divisors (20512167).

36921573 is a wasteful number, since it uses less digits than its factorization.

36921573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315588 (or 315585 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 36921573 is about 6076.3124508208. The cubic root of 36921573 is about 332.9865806350.

The spelling of 36921573 in words is "thirty-six million, nine hundred twenty-one thousand, five hundred seventy-three".