70442657 has 4 divisors (see below), whose sum is σ = 70745220. Its totient is φ = 70140096.

The previous prime is 70442651. The next prime is 70442663. The reversal of 70442657 is 75624407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75624407 = 31 ⋅2439497.

It is an interprime number because it is at equal distance from previous prime (70442651) and next prime (70442663).

It can be written as a sum of positive squares in 2 ways, for example, as 45751696 + 24690961 = 6764^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 70442657 - 2¹⁰ = 70441633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70442651) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 150932 + ... + 151397.

It is an arithmetic number, because the mean of its divisors is an integer number (17686305).

Almost surely, 2^70442657 is an apocalyptic number.

It is an amenable number.

70442657 is a deficient number, since it is larger than the sum of its proper divisors (302563).

70442657 is a wasteful number, since it uses less digits than its factorization.

70442657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302562.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 70442657 is about 8393.0123912693. The cubic root of 70442657 is about 412.9954270199.

The spelling of 70442657 in words is "seventy million, four hundred forty-two thousand, six hundred fifty-seven".