70706639 has 2 divisors, whose sum is σ = 70706640. Its totient is φ = 70706638.

The previous prime is 70706633. The next prime is 70706651. The reversal of 70706639 is 93660707.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70706639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70706633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35353319 + 35353320.

It is an arithmetic number, because the mean of its divisors is an integer number (35353320).

Almost surely, 2^70706639 is an apocalyptic number.

70706639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70706639 is an equidigital number, since it uses as much as digits as its factorization.

70706639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 70706639 is about 8408.7239816752. The cubic root of 70706639 is about 413.5106804137.

The spelling of 70706639 in words is "seventy million, seven hundred six thousand, six hundred thirty-nine".