70550639 has 2 divisors, whose sum is σ = 70550640. Its totient is φ = 70550638.

The previous prime is 70550633. The next prime is 70550651. The reversal of 70550639 is 93605507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70550639 - 2²⁰ = 69502063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70550599 and 70550608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70550633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35275319 + 35275320.

It is an arithmetic number, because the mean of its divisors is an integer number (35275320).

Almost surely, 2^70550639 is an apocalyptic number.

70550639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70550639 is an equidigital number, since it uses as much as digits as its factorization.

70550639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 70550639 is about 8399.4427791372. The cubic root of 70550639 is about 413.2063470613.

The spelling of 70550639 in words is "seventy million, five hundred fifty thousand, six hundred thirty-nine".