70643407 has 4 divisors (see below), whose sum is σ = 70693480. Its totient is φ = 70593336.

The previous prime is 70643401. The next prime is 70643411. The reversal of 70643407 is 70434607.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70643407 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 (70643401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22857 + ... + 25762.

It is an arithmetic number, because the mean of its divisors is an integer number (17673370).

Almost surely, 2^70643407 is an apocalyptic number.

70643407 is a deficient number, since it is larger than the sum of its proper divisors (50073).

70643407 is a wasteful number, since it uses less digits than its factorization.

70643407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50072.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 70643407 is about 8404.9632360885. The cubic root of 70643407 is about 413.3873779632.

The spelling of 70643407 in words is "seventy million, six hundred forty-three thousand, four hundred seven".