70342639 has 2 divisors, whose sum is σ = 70342640. Its totient is φ = 70342638.

The previous prime is 70342621. The next prime is 70342667. The reversal of 70342639 is 93624307.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70342639 - 2²⁵ = 36788207 is a prime.

It is a super-2 number, since 2×70342639² = 9896173722968642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70342609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35171319 + 35171320.

It is an arithmetic number, because the mean of its divisors is an integer number (35171320).

Almost surely, 2^70342639 is an apocalyptic number.

70342639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70342639 is an equidigital number, since it uses as much as digits as its factorization.

70342639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 70342639 is about 8387.0518658227. The cubic root of 70342639 is about 412.7998705976.

The spelling of 70342639 in words is "seventy million, three hundred forty-two thousand, six hundred thirty-nine".