86439874 has 4 divisors (see below), whose sum is σ = 129659814. Its totient is φ = 43219936.

The previous prime is 86439863. The next prime is 86439887. The reversal of 86439874 is 47893468.

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., 86397025 + 42849 = 9295^2 + 207^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21609967 + ... + 21609970.

Almost surely, 2^86439874 is an apocalyptic number.

86439874 is a deficient number, since it is larger than the sum of its proper divisors (43219940).

86439874 is a wasteful number, since it uses less digits than its factorization.

86439874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43219939.

The product of its digits is 1161216, while the sum is 49.

The square root of 86439874 is about 9297.3046631806. The cubic root of 86439874 is about 442.1517772812.

The spelling of 86439874 in words is "eighty-six million, four hundred thirty-nine thousand, eight hundred seventy-four".