874563721 has 4 divisors (see below), whose sum is σ = 874811392. Its totient is φ = 874316052.

The previous prime is 874563689. The next prime is 874563727. The reversal of 874563721 is 127365478.

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 874563721 - 2⁵ = 874563689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (874563727) 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, 118461 + ... + 125626.

It is an arithmetic number, because the mean of its divisors is an integer number (218702848).

Almost surely, 2^874563721 is an apocalyptic number.

It is an amenable number.

874563721 is a deficient number, since it is larger than the sum of its proper divisors (247671).

874563721 is a wasteful number, since it uses less digits than its factorization.

874563721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247670.

The product of its digits is 282240, while the sum is 43.

The square root of 874563721 is about 29573.0235349719. The cubic root of 874563721 is about 956.3065989197.

The spelling of 874563721 in words is "eight hundred seventy-four million, five hundred sixty-three thousand, seven hundred twenty-one".