943972421 has 16 divisors (see below), whose sum is σ = 1162022400. Its totient is φ = 748703088.

The previous prime is 943972411. The next prime is 943972429. The reversal of 943972421 is 124279349.

It is not a de Polignac number, because 943972421 - 2⁶ = 943972357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943972429) 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, 76811 + ... + 88248.

It is an arithmetic number, because the mean of its divisors is an integer number (72626400).

Almost surely, 2^943972421 is an apocalyptic number.

It is an amenable number.

943972421 is a deficient number, since it is larger than the sum of its proper divisors (218049979).

943972421 is a wasteful number, since it uses less digits than its factorization.

943972421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165128.

The product of its digits is 108864, while the sum is 41.

The square root of 943972421 is about 30724.1341781994. The cubic root of 943972421 is about 980.9640731498.

The spelling of 943972421 in words is "nine hundred forty-three million, nine hundred seventy-two thousand, four hundred twenty-one".