70997705 has 4 divisors (see below), whose sum is σ = 85197252. Its totient is φ = 56798160.

The previous prime is 70997681. The next prime is 70997723. The reversal of 70997705 is 50779907.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7333264 + 63664441 = 2708^2 + 7979^2 .

It is not a de Polignac number, because 70997705 - 2⁸ = 70997449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7099766 + ... + 7099775.

It is an arithmetic number, because the mean of its divisors is an integer number (21299313).

Almost surely, 2^70997705 is an apocalyptic number.

It is an amenable number.

70997705 is a deficient number, since it is larger than the sum of its proper divisors (14199547).

70997705 is a wasteful number, since it uses less digits than its factorization.

70997705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14199546.

The product of its (nonzero) digits is 138915, while the sum is 44.

The square root of 70997705 is about 8426.0135888806. The cubic root of 70997705 is about 414.0773133089.

The spelling of 70997705 in words is "seventy million, nine hundred ninety-seven thousand, seven hundred five".