940861021 has 4 divisors (see below), whose sum is σ = 940949344. Its totient is φ = 940772700.

The previous prime is 940861013. The next prime is 940861037. The reversal of 940861021 is 120168049.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 940861021 - 2³ = 940861013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940861001) 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, 25575 + ... + 50356.

It is an arithmetic number, because the mean of its divisors is an integer number (235237336).

Almost surely, 2^940861021 is an apocalyptic number.

It is an amenable number.

940861021 is a deficient number, since it is larger than the sum of its proper divisors (88323).

940861021 is a wasteful number, since it uses less digits than its factorization.

940861021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88322.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 940861021 is about 30673.4579237490. The cubic root of 940861021 is about 979.8851111326.

The spelling of 940861021 in words is "nine hundred forty million, eight hundred sixty-one thousand, twenty-one".