874391813 has 4 divisors (see below), whose sum is σ = 876774720. Its totient is φ = 872008908.

The previous prime is 874391809. The next prime is 874391839. The reversal of 874391813 is 318193478.

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 874391813 - 2² = 874391809 is a prime.

It is a super-2 number, since 2×874391813² = 1529122085282853938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (874391113) 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, 1190903 + ... + 1191636.

It is an arithmetic number, because the mean of its divisors is an integer number (219193680).

Almost surely, 2^874391813 is an apocalyptic number.

It is an amenable number.

874391813 is a deficient number, since it is larger than the sum of its proper divisors (2382907).

874391813 is a wasteful number, since it uses less digits than its factorization.

874391813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382906.

The product of its digits is 145152, while the sum is 44.

The square root of 874391813 is about 29570.1168918894. The cubic root of 874391813 is about 956.2439362368.

The spelling of 874391813 in words is "eight hundred seventy-four million, three hundred ninety-one thousand, eight hundred thirteen".