70399505 has 16 divisors (see below), whose sum is σ = 92841984. Its totient is φ = 50820480.

The previous prime is 70399487. The next prime is 70399591. The reversal of 70399505 is 50599307.

It is not a de Polignac number, because 70399505 - 2⁸ = 70399249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2864 + ... + 12206.

It is an arithmetic number, because the mean of its divisors is an integer number (5802624).

Almost surely, 2^70399505 is an apocalyptic number.

It is an amenable number.

70399505 is a deficient number, since it is larger than the sum of its proper divisors (22442479).

70399505 is a wasteful number, since it uses less digits than its factorization.

70399505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 70399505 is about 8390.4412875605. The cubic root of 70399505 is about 412.9110784177.

The spelling of 70399505 in words is "seventy million, three hundred ninety-nine thousand, five hundred five".