373431921 has 16 divisors (see below), whose sum is σ = 514498560. Its totient is φ = 240676560.

The previous prime is 373431917. The next prime is 373432019. The reversal of 373431921 is 129134373.

It is not a de Polignac number, because 373431921 - 2² = 373431917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (373431901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145576 + ... + 148118.

It is an arithmetic number, because the mean of its divisors is an integer number (32156160).

Almost surely, 2^373431921 is an apocalyptic number.

373431921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

373431921 is a deficient number, since it is larger than the sum of its proper divisors (141066639).

373431921 is a wasteful number, since it uses less digits than its factorization.

373431921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156.

The product of its digits is 13608, while the sum is 33.

The square root of 373431921 is about 19324.3866914322. The cubic root of 373431921 is about 720.1182425403.

The spelling of 373431921 in words is "three hundred seventy-three million, four hundred thirty-one thousand, nine hundred twenty-one".