7391563921 has 8 divisors (see below), whose sum is σ = 8549279424. Its totient is φ = 6259292880.

The previous prime is 7391563897. The next prime is 7391563961. The reversal of 7391563921 is 1293651937.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7391563921 - 2¹³ = 7391555729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7391563961) 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 7 ways as a sum of consecutive naturals, for example, 6360490 + ... + 6361651.

It is an arithmetic number, because the mean of its divisors is an integer number (1068659928).

Almost surely, 2^7391563921 is an apocalyptic number.

It is an amenable number.

7391563921 is a deficient number, since it is larger than the sum of its proper divisors (1157715503).

7391563921 is a wasteful number, since it uses less digits than its factorization.

7391563921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12722231.

The product of its digits is 306180, while the sum is 46.

The square root of 7391563921 is about 85974.2049745155. The cubic root of 7391563921 is about 1947.9543677040.

The spelling of 7391563921 in words is "seven billion, three hundred ninety-one million, five hundred sixty-three thousand, nine hundred twenty-one".