936690021 has 16 divisors (see below), whose sum is σ = 1469318400. Its totient is φ = 587726784.

The previous prime is 936689993. The next prime is 936690031. The reversal of 936690021 is 120096639.

It is not a de Polignac number, because 936690021 - 2¹³ = 936681829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (936690031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019901 + ... + 1020818.

It is an arithmetic number, because the mean of its divisors is an integer number (91832400).

Almost surely, 2^936690021 is an apocalyptic number.

It is an amenable number.

936690021 is a deficient number, since it is larger than the sum of its proper divisors (532628379).

936690021 is a wasteful number, since it uses less digits than its factorization.

936690021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040745 (or 2040739 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 936690021 is about 30605.3920249357. The cubic root of 936690021 is about 978.4349659163.

The spelling of 936690021 in words is "nine hundred thirty-six million, six hundred ninety thousand, twenty-one".