70644407 has 4 divisors (see below), whose sum is σ = 71538720. Its totient is φ = 69750096.

The previous prime is 70644347. The next prime is 70644467. The reversal of 70644407 is 70444607.

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

It is an interprime number because it is at equal distance from previous prime (70644347) and next prime (70644467).

It is a cyclic number.

It is not a de Polignac number, because 70644407 - 2⁸ = 70644151 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 (70644467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447038 + ... + 447195.

It is an arithmetic number, because the mean of its divisors is an integer number (17884680).

Almost surely, 2^70644407 is an apocalyptic number.

70644407 is a deficient number, since it is larger than the sum of its proper divisors (894313).

70644407 is an equidigital number, since it uses as much as digits as its factorization.

70644407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894312.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 70644407 is about 8405.0227245380. The cubic root of 70644407 is about 413.3893285365.

The spelling of 70644407 in words is "seventy million, six hundred forty-four thousand, four hundred seven".