373431981 has 16 divisors (see below), whose sum is σ = 536982656. Its totient is φ = 229473216.

The previous prime is 373431917. The next prime is 373432019. The reversal of 373431981 is 189134373.

It is a happy number.

It is not a de Polignac number, because 373431981 - 2⁶ = 373431917 is a prime.

It is a super-2 number, since 2×373431981² = 278902888867168722, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (373431901) 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, 22056 + ... + 35118.

It is an arithmetic number, because the mean of its divisors is an integer number (33561416).

Almost surely, 2^373431981 is an apocalyptic number.

It is an amenable number.

373431981 is a deficient number, since it is larger than the sum of its proper divisors (163550675).

373431981 is a wasteful number, since it uses less digits than its factorization.

373431981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13812.

The product of its digits is 54432, while the sum is 39.

The square root of 373431981 is about 19324.3882438746. The cubic root of 373431981 is about 720.1182811079.

The spelling of 373431981 in words is "three hundred seventy-three million, four hundred thirty-one thousand, nine hundred eighty-one".