70439587 has 2 divisors, whose sum is σ = 70439588. Its totient is φ = 70439586.

The previous prime is 70439581. The next prime is 70439647. The reversal of 70439587 is 78593407.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78593407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70439587 - 2⁷ = 70439459 is a prime.

It is not a weakly prime, because it can be changed into another prime (70439581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35219793 + 35219794.

It is an arithmetic number, because the mean of its divisors is an integer number (35219794).

Almost surely, 2^70439587 is an apocalyptic number.

70439587 is a deficient number, since it is larger than the sum of its proper divisors (1).

70439587 is an equidigital number, since it uses as much as digits as its factorization.

70439587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 70439587 is about 8392.8294990426. The cubic root of 70439587 is about 412.9894272728.

The spelling of 70439587 in words is "seventy million, four hundred thirty-nine thousand, five hundred eighty-seven".