867491615 has 4 divisors (see below), whose sum is σ = 1040989944. Its totient is φ = 693993288.

The previous prime is 867491609. The next prime is 867491663. The reversal of 867491615 is 516194768.

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

It is a cyclic number.

It is not a de Polignac number, because 867491615 - 2¹² = 867487519 is a prime.

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 867491615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86749157 + ... + 86749166.

It is an arithmetic number, because the mean of its divisors is an integer number (260247486).

Almost surely, 2^867491615 is an apocalyptic number.

867491615 is a deficient number, since it is larger than the sum of its proper divisors (173498329).

867491615 is a wasteful number, since it uses less digits than its factorization.

867491615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173498328.

The product of its digits is 362880, while the sum is 47.

The square root of 867491615 is about 29453.2106059764. The cubic root of 867491615 is about 953.7219144587.

The spelling of 867491615 in words is "eight hundred sixty-seven million, four hundred ninety-one thousand, six hundred fifteen".