7387963921 has 24 divisors (see below), whose sum is σ = 8480332224. Its totient is φ = 6396852480.

The previous prime is 7387963871. The next prime is 7387963931. The reversal of 7387963921 is 1293697837.

It is a happy number.

It is not a de Polignac number, because 7387963921 - 2²⁷ = 7253746193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7387963931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1165266 + ... + 1171588.

It is an arithmetic number, because the mean of its divisors is an integer number (353347176).

Almost surely, 2^7387963921 is an apocalyptic number.

It is an amenable number.

7387963921 is a deficient number, since it is larger than the sum of its proper divisors (1092368303).

7387963921 is a wasteful number, since it uses less digits than its factorization.

7387963921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681 (or 6664 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 55.

The square root of 7387963921 is about 85953.2659123550. The cubic root of 7387963921 is about 1947.6380713338.

The spelling of 7387963921 in words is "seven billion, three hundred eighty-seven million, nine hundred sixty-three thousand, nine hundred twenty-one".