70442539 has 2 divisors, whose sum is σ = 70442540. Its totient is φ = 70442538.

The previous prime is 70442531. The next prime is 70442563. The reversal of 70442539 is 93524407.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70442539 - 2³ = 70442531 is a prime.

It is not a weakly prime, because it can be changed into another prime (70442531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35221269 + 35221270.

It is an arithmetic number, because the mean of its divisors is an integer number (35221270).

Almost surely, 2^70442539 is an apocalyptic number.

70442539 is a deficient number, since it is larger than the sum of its proper divisors (1).

70442539 is an equidigital number, since it uses as much as digits as its factorization.

70442539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 70442539 is about 8393.0053616092. The cubic root of 70442539 is about 412.9951964140.

The spelling of 70442539 in words is "seventy million, four hundred forty-two thousand, five hundred thirty-nine".