70705405 has 8 divisors (see below), whose sum is σ = 86237784. Its totient is φ = 55636800.

The previous prime is 70705399. The next prime is 70705429. The reversal of 70705405 is 50450707.

It can be written as a sum of positive squares in 4 ways, for example, as 6095961 + 64609444 = 2469^2 + 8038^2 .

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

It is not a de Polignac number, because 70705405 - 2¹³ = 70697213 is a prime.

It is a Duffinian number.

It is a congruent 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, 115606 + ... + 116215.

It is an arithmetic number, because the mean of its divisors is an integer number (10779723).

Almost surely, 2^70705405 is an apocalyptic number.

It is an amenable number.

70705405 is a deficient number, since it is larger than the sum of its proper divisors (15532379).

70705405 is a wasteful number, since it uses less digits than its factorization.

70705405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231887.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 70705405 is about 8408.6506051804. The cubic root of 70705405 is about 413.5082748162.

The spelling of 70705405 in words is "seventy million, seven hundred five thousand, four hundred five".