864781474 has 4 divisors (see below), whose sum is σ = 1297172214. Its totient is φ = 432390736.

The previous prime is 864781457. The next prime is 864781499. The reversal of 864781474 is 474187468.

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

It can be written as a sum of positive squares in only one way, i.e., 864654025 + 127449 = 29405^2 + 357^2 .

It is a super-2 number, since 2×864781474² = 1495693995547225352, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216195367 + ... + 216195370.

Almost surely, 2^864781474 is an apocalyptic number.

864781474 is a deficient number, since it is larger than the sum of its proper divisors (432390740).

864781474 is a wasteful number, since it uses less digits than its factorization.

864781474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432390739.

The product of its digits is 1204224, while the sum is 49.

The square root of 864781474 is about 29407.1670515880. The cubic root of 864781474 is about 952.7277003544.

The spelling of 864781474 in words is "eight hundred sixty-four million, seven hundred eighty-one thousand, four hundred seventy-four".