70006637 has 4 divisors (see below), whose sum is σ = 70393596. Its totient is φ = 69619680.

The previous prime is 70006633. The next prime is 70006691. The reversal of 70006637 is 73660007.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25664356 + 44342281 = 5066^2 + 6659^2 .

It is a cyclic number.

It is not a de Polignac number, because 70006637 - 2² = 70006633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70006633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193208 + ... + 193569.

It is an arithmetic number, because the mean of its divisors is an integer number (17598399).

Almost surely, 2^70006637 is an apocalyptic number.

It is an amenable number.

70006637 is a deficient number, since it is larger than the sum of its proper divisors (386959).

70006637 is a wasteful number, since it uses less digits than its factorization.

70006637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386958.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 70006637 is about 8366.9968925535. The cubic root of 70006637 is about 412.1415547933.

The spelling of 70006637 in words is "seventy million, six thousand, six hundred thirty-seven".