73921162921 has 4 divisors (see below), whose sum is σ = 74374667152. Its totient is φ = 73467658692.

The previous prime is 73921162901. The next prime is 73921162967. The reversal of 73921162921 is 12926112937.

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 73921162921 - 2²⁵ = 73887608489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73921162901) 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, 226751871 + ... + 226752196.

It is an arithmetic number, because the mean of its divisors is an integer number (18593666788).

Almost surely, 2^73921162921 is an apocalyptic number.

It is an amenable number.

73921162921 is a deficient number, since it is larger than the sum of its proper divisors (453504231).

73921162921 is a wasteful number, since it uses less digits than its factorization.

73921162921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453504230.

The product of its digits is 81648, while the sum is 43.

The spelling of 73921162921 in words is "seventy-three billion, nine hundred twenty-one million, one hundred sixty-two thousand, nine hundred twenty-one".