70430639 has 2 divisors, whose sum is σ = 70430640. Its totient is φ = 70430638.

The previous prime is 70430629. The next prime is 70430653. The reversal of 70430639 is 93603407.

It is a weak prime.

It is an emirp because it is prime and its reverse (93603407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70430639 - 2¹⁶ = 70365103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70430629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35215319 + 35215320.

It is an arithmetic number, because the mean of its divisors is an integer number (35215320).

Almost surely, 2^70430639 is an apocalyptic number.

70430639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70430639 is an equidigital number, since it uses as much as digits as its factorization.

70430639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 70430639 is about 8392.2964080161. The cubic root of 70430639 is about 412.9719390675.

The spelling of 70430639 in words is "seventy million, four hundred thirty thousand, six hundred thirty-nine".