70400986 has 4 divisors (see below), whose sum is σ = 105601482. Its totient is φ = 35200492.

The previous prime is 70400963. The next prime is 70400989. The reversal of 70400986 is 68900407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68900407 = 1051 ⋅65557.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 35176761 = 5935^2 + 5931^2 .

It is not an unprimeable number, because it can be changed into a prime (70400989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17600245 + ... + 17600248.

Almost surely, 2^70400986 is an apocalyptic number.

70400986 is a deficient number, since it is larger than the sum of its proper divisors (35200496).

70400986 is a wasteful number, since it uses less digits than its factorization.

70400986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35200495.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 70400986 is about 8390.5295422875. The cubic root of 70400986 is about 412.9139738785.

The spelling of 70400986 in words is "seventy million, four hundred thousand, nine hundred eighty-six".