70243505 has 8 divisors (see below), whose sum is σ = 84378024. Its totient is φ = 56137600.

The previous prime is 70243487. The next prime is 70243519. The reversal of 70243505 is 50534207.

It can be written as a sum of positive squares in 4 ways, for example, as 33362176 + 36881329 = 5776^2 + 6073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70243505 - 2⁶ = 70243441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316 + ... + 11925.

It is an arithmetic number, because the mean of its divisors is an integer number (10547253).

Almost surely, 2^70243505 is an apocalyptic number.

It is an amenable number.

70243505 is a deficient number, since it is larger than the sum of its proper divisors (14134519).

70243505 is a wasteful number, since it uses less digits than its factorization.

70243505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14307.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 70243505 is about 8381.1398389479. The cubic root of 70243505 is about 412.6058595773.

The spelling of 70243505 in words is "seventy million, two hundred forty-three thousand, five hundred five".