36858721 has 4 divisors (see below), whose sum is σ = 38047744. Its totient is φ = 35669700.

The previous prime is 36858667. The next prime is 36858743. The reversal of 36858721 is 12785863.

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 36858721 - 2⁷ = 36858593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36858751) 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, 594465 + ... + 594526.

It is an arithmetic number, because the mean of its divisors is an integer number (9511936).

Almost surely, 2^36858721 is an apocalyptic number.

36858721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

36858721 is a deficient number, since it is larger than the sum of its proper divisors (1189023).

36858721 is a wasteful number, since it uses less digits than its factorization.

36858721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189022.

The product of its digits is 80640, while the sum is 40.

The square root of 36858721 is about 6071.1383611313. The cubic root of 36858721 is about 332.7975244101.

The spelling of 36858721 in words is "thirty-six million, eight hundred fifty-eight thousand, seven hundred twenty-one".