71600921 has 4 divisors (see below), whose sum is σ = 81829632. Its totient is φ = 61372212.

The previous prime is 71600897. The next prime is 71600929. The reversal of 71600921 is 12900617.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12900617 = 1483 ⋅8699.

It is a cyclic number.

It is not a de Polignac number, because 71600921 - 2⁶ = 71600857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71600929) 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, 5114345 + ... + 5114358.

It is an arithmetic number, because the mean of its divisors is an integer number (20457408).

Almost surely, 2^71600921 is an apocalyptic number.

It is an amenable number.

71600921 is a deficient number, since it is larger than the sum of its proper divisors (10228711).

71600921 is a wasteful number, since it uses less digits than its factorization.

71600921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228710.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 71600921 is about 8461.7327421752. The cubic root of 71600921 is about 415.2467125475.

The spelling of 71600921 in words is "seventy-one million, six hundred thousand, nine hundred twenty-one".