70405687 has 8 divisors (see below), whose sum is σ = 81324432. Its totient is φ = 60240000.

The previous prime is 70405661. The next prime is 70405711. The reversal of 70405687 is 78650407.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 70405687 - 2¹⁵ = 70372919 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 (70405987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188064 + ... + 188437.

It is an arithmetic number, because the mean of its divisors is an integer number (10165554).

Almost surely, 2^70405687 is an apocalyptic number.

70405687 is a deficient number, since it is larger than the sum of its proper divisors (10918745).

70405687 is a wasteful number, since it uses less digits than its factorization.

70405687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376529.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 70405687 is about 8390.8096748764. The cubic root of 70405687 is about 412.9231644002.

The spelling of 70405687 in words is "seventy million, four hundred five thousand, six hundred eighty-seven".