86900978 has 4 divisors (see below), whose sum is σ = 130351470. Its totient is φ = 43450488.

The previous prime is 86900977. The next prime is 86900981. The reversal of 86900978 is 87900968.

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., 68178049 + 18722929 = 8257^2 + 4327^2 .

It is not an unprimeable number, because it can be changed into a prime (86900971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725243 + ... + 21725246.

Almost surely, 2^86900978 is an apocalyptic number.

86900978 is a deficient number, since it is larger than the sum of its proper divisors (43450492).

86900978 is a wasteful number, since it uses less digits than its factorization.

86900978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43450491.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 86900978 is about 9322.0694054486. The cubic root of 86900978 is about 442.9365867784.

It can be divided in two parts, 86900 and 978, that added together give a palindrome (87878).

The spelling of 86900978 in words is "eighty-six million, nine hundred thousand, nine hundred seventy-eight".