36723981 has 32 divisors (see below), whose sum is σ = 57888000. Its totient is φ = 20697600.

The previous prime is 36723971. The next prime is 36723989. The reversal of 36723981 is 18932763.

It is not a de Polignac number, because 36723981 - 2⁵ = 36723949 is a prime.

It is a super-2 number, since 2×36723981² = 2697301560976722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36723989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91381 + ... + 91781.

It is an arithmetic number, because the mean of its divisors is an integer number (1809000).

Almost surely, 2^36723981 is an apocalyptic number.

It is an amenable number.

36723981 is a deficient number, since it is larger than the sum of its proper divisors (21164019).

36723981 is an equidigital number, since it uses as much as digits as its factorization.

36723981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 500 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 36723981 is about 6060.0314355620. The cubic root of 36723981 is about 332.3915066158.

The spelling of 36723981 in words is "thirty-six million, seven hundred twenty-three thousand, nine hundred eighty-one".