70263139 has 2 divisors, whose sum is σ = 70263140. Its totient is φ = 70263138.

The previous prime is 70263133. The next prime is 70263163. The reversal of 70263139 is 93136207.

It is a weak prime.

It is an emirp because it is prime and its reverse (93136207) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70263139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70263139.

It is not a weakly prime, because it can be changed into another prime (70263133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35131569 + 35131570.

It is an arithmetic number, because the mean of its divisors is an integer number (35131570).

Almost surely, 2^70263139 is an apocalyptic number.

70263139 is a deficient number, since it is larger than the sum of its proper divisors (1).

70263139 is an equidigital number, since it uses as much as digits as its factorization.

70263139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 70263139 is about 8382.3110775012. The cubic root of 70263139 is about 412.6442989498.

The spelling of 70263139 in words is "seventy million, two hundred sixty-three thousand, one hundred thirty-nine".