70138637 has 2 divisors, whose sum is σ = 70138638. Its totient is φ = 70138636.

The previous prime is 70138631. The next prime is 70138693. The reversal of 70138637 is 73683107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58537801 + 11600836 = 7651^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 70138637 - 2⁸ = 70138381 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70138597 and 70138606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70138631) 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 as a sum of consecutive naturals, namely, 35069318 + 35069319.

It is an arithmetic number, because the mean of its divisors is an integer number (35069319).

Almost surely, 2^70138637 is an apocalyptic number.

It is an amenable number.

70138637 is a deficient number, since it is larger than the sum of its proper divisors (1).

70138637 is an equidigital number, since it uses as much as digits as its factorization.

70138637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 70138637 is about 8374.8813125918. The cubic root of 70138637 is about 412.4004280021.

The spelling of 70138637 in words is "seventy million, one hundred thirty-eight thousand, six hundred thirty-seven".