70942639 has 2 divisors, whose sum is σ = 70942640. Its totient is φ = 70942638.

The previous prime is 70942633. The next prime is 70942661. The reversal of 70942639 is 93624907.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70942639 - 2¹¹ = 70940591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70942633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35471319 + 35471320.

It is an arithmetic number, because the mean of its divisors is an integer number (35471320).

Almost surely, 2^70942639 is an apocalyptic number.

70942639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70942639 is an equidigital number, since it uses as much as digits as its factorization.

70942639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 70942639 is about 8422.7453362903. The cubic root of 70942639 is about 413.9702324821.

The spelling of 70942639 in words is "seventy million, nine hundred forty-two thousand, six hundred thirty-nine".