867709491 has 16 divisors (see below), whose sum is σ = 1262642688. Its totient is φ = 525668000.

The previous prime is 867709489. The next prime is 867709501. The reversal of 867709491 is 194907768.

867709491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 867709491 - 2¹ = 867709489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867709411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117766 + ... + 124916.

It is an arithmetic number, because the mean of its divisors is an integer number (78915168).

Almost surely, 2^867709491 is an apocalyptic number.

867709491 is a deficient number, since it is larger than the sum of its proper divisors (394933197).

867709491 is a wasteful number, since it uses less digits than its factorization.

867709491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10842.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 867709491 is about 29456.9090537347. The cubic root of 867709491 is about 953.8017522034.

The spelling of 867709491 in words is "eight hundred sixty-seven million, seven hundred nine thousand, four hundred ninety-one".