376531921 has 4 divisors (see below), whose sum is σ = 388678144. Its totient is φ = 364385700.

The previous prime is 376531913. The next prime is 376531931. The reversal of 376531921 is 129135673.

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 an emirpimes, since its reverse is a distinct semiprime: 129135673 = 191 ⋅676103.

It is a cyclic number.

It is not a de Polignac number, because 376531921 - 2³ = 376531913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (376531901) 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, 6073065 + ... + 6073126.

It is an arithmetic number, because the mean of its divisors is an integer number (97169536).

Almost surely, 2^376531921 is an apocalyptic number.

376531921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

376531921 is a deficient number, since it is larger than the sum of its proper divisors (12146223).

376531921 is a wasteful number, since it uses less digits than its factorization.

376531921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146222.

The product of its digits is 34020, while the sum is 37.

The square root of 376531921 is about 19404.4304477096. The cubic root of 376531921 is about 722.1054121048.

The spelling of 376531921 in words is "three hundred seventy-six million, five hundred thirty-one thousand, nine hundred twenty-one".