70644307 has 4 divisors (see below), whose sum is σ = 70732440. Its totient is φ = 70556176.

The previous prime is 70644269. The next prime is 70644311. The reversal of 70644307 is 70344607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70344607 = 541 ⋅130027.

It is a cyclic number.

It is not a de Polignac number, because 70644307 - 2⁷ = 70644179 is a prime.

It is a super-2 number, since 2×70644307² = 9981236223020498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70644347) 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, 42853 + ... + 44470.

It is an arithmetic number, because the mean of its divisors is an integer number (17683110).

Almost surely, 2^70644307 is an apocalyptic number.

70644307 is a deficient number, since it is larger than the sum of its proper divisors (88133).

70644307 is an equidigital number, since it uses as much as digits as its factorization.

70644307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88132.

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

The square root of 70644307 is about 8405.0167757120. The cubic root of 70644307 is about 413.3891334800.

The spelling of 70644307 in words is "seventy million, six hundred forty-four thousand, three hundred seven".