944136921 has 24 divisors (see below), whose sum is σ = 1557871680. Its totient is φ = 498004416.

The previous prime is 944136911. The next prime is 944136929. The reversal of 944136921 is 129631449.

It is not a de Polignac number, because 944136921 - 2⁶ = 944136857 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 944136921.

It is not an unprimeable number, because it can be changed into a prime (944136929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129466 + ... + 136563.

It is an arithmetic number, because the mean of its divisors is an integer number (64911320).

Almost surely, 2^944136921 is an apocalyptic number.

944136921 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

944136921 is a deficient number, since it is larger than the sum of its proper divisors (613734759).

944136921 is a wasteful number, since it uses less digits than its factorization.

944136921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266065 (or 266052 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 944136921 is about 30726.8111101689. The cubic root of 944136921 is about 981.0210519392.

The spelling of 944136921 in words is "nine hundred forty-four million, one hundred thirty-six thousand, nine hundred twenty-one".