387972437 has 4 divisors (see below), whose sum is σ = 390352800. Its totient is φ = 385592076.

The previous prime is 387972407. The next prime is 387972493. The reversal of 387972437 is 734279783.

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.

It is a cyclic number.

It is not a de Polignac number, because 387972437 - 2¹⁸ = 387710293 is a prime.

It is a super-2 number, since 2×387972437² = 301045223743437938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387972407) 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, 1189937 + ... + 1190262.

It is an arithmetic number, because the mean of its divisors is an integer number (97588200).

Almost surely, 2^387972437 is an apocalyptic number.

It is an amenable number.

387972437 is a deficient number, since it is larger than the sum of its proper divisors (2380363).

387972437 is a wasteful number, since it uses less digits than its factorization.

387972437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380362.

The product of its digits is 1778112, while the sum is 50.

The square root of 387972437 is about 19697.0159415075. The cubic root of 387972437 is about 729.3460315707.

The spelling of 387972437 in words is "three hundred eighty-seven million, nine hundred seventy-two thousand, four hundred thirty-seven".