874392389 has 4 divisors (see below), whose sum is σ = 941653356. Its totient is φ = 807131424.

The previous prime is 874392373. The next prime is 874392391. The reversal of 874392389 is 983293478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120450625 + 753941764 = 10975^2 + 27458^2 .

It is a cyclic number.

It is not a de Polignac number, because 874392389 - 2⁴ = 874392373 is a prime.

It is a super-2 number, since 2×874392389² = 1529124099882254642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 874392389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (874392329) 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, 33630464 + ... + 33630489.

It is an arithmetic number, because the mean of its divisors is an integer number (235413339).

Almost surely, 2^874392389 is an apocalyptic number.

It is an amenable number.

874392389 is a deficient number, since it is larger than the sum of its proper divisors (67260967).

874392389 is a wasteful number, since it uses less digits than its factorization.

874392389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67260966.

The product of its digits is 2612736, while the sum is 53.

The square root of 874392389 is about 29570.1266314502. The cubic root of 874392389 is about 956.2441462099.

The spelling of 874392389 in words is "eight hundred seventy-four million, three hundred ninety-two thousand, three hundred eighty-nine".