507354394921 has 4 divisors (see below), whose sum is σ = 553477521744. Its totient is φ = 461231268100.

The previous prime is 507354394889. The next prime is 507354394933. The reversal of 507354394921 is 129493453705.

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 507354394921 - 2⁵ = 507354394889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507354394991) 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, 23061563395 + ... + 23061563416.

It is an arithmetic number, because the mean of its divisors is an integer number (138369380436).

Almost surely, 2^507354394921 is an apocalyptic number.

It is an amenable number.

507354394921 is a deficient number, since it is larger than the sum of its proper divisors (46123126823).

507354394921 is a wasteful number, since it uses less digits than its factorization.

507354394921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46123126822.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 507354394921 in words is "five hundred seven billion, three hundred fifty-four million, three hundred ninety-four thousand, nine hundred twenty-one".