869247491 has 8 divisors (see below), whose sum is σ = 996049920. Its totient is φ = 743101128.

The previous prime is 869247461. The next prime is 869247497. The reversal of 869247491 is 194742968.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 869247491 - 2¹⁸ = 868985347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869247497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161171 + ... + 166476.

It is an arithmetic number, because the mean of its divisors is an integer number (124506240).

Almost surely, 2^869247491 is an apocalyptic number.

869247491 is a deficient number, since it is larger than the sum of its proper divisors (126802429).

869247491 is a wasteful number, since it uses less digits than its factorization.

869247491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328033.

The product of its digits is 870912, while the sum is 50.

The square root of 869247491 is about 29483.0034257027. The cubic root of 869247491 is about 954.3649519262.

The spelling of 869247491 in words is "eight hundred sixty-nine million, two hundred forty-seven thousand, four hundred ninety-one".