70239917 has 4 divisors (see below), whose sum is σ = 76625376. Its totient is φ = 63854460.

The previous prime is 70239901. The next prime is 70239959. The reversal of 70239917 is 71993207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70239917 - 2⁴ = 70239901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70239977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3192713 + ... + 3192734.

It is an arithmetic number, because the mean of its divisors is an integer number (19156344).

Almost surely, 2^70239917 is an apocalyptic number.

It is an amenable number.

70239917 is a deficient number, since it is larger than the sum of its proper divisors (6385459).

70239917 is a wasteful number, since it uses less digits than its factorization.

70239917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385458.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 70239917 is about 8380.9257841840. The cubic root of 70239917 is about 412.5988342301.

The spelling of 70239917 in words is "seventy million, two hundred thirty-nine thousand, nine hundred seventeen".