70431609 has 8 divisors (see below), whose sum is σ = 96447040. Its totient is φ = 45685296.

The previous prime is 70431593. The next prime is 70431611. The reversal of 70431609 is 90613407.

It is a happy number.

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

It is not a de Polignac number, because 70431609 - 2⁴ = 70431593 is a prime.

It is a super-2 number, since 2×70431609² = 9921223092657762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70431649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317149 + ... + 317370.

It is an arithmetic number, because the mean of its divisors is an integer number (12055880).

Almost surely, 2^70431609 is an apocalyptic number.

It is an amenable number.

70431609 is a deficient number, since it is larger than the sum of its proper divisors (26015431).

70431609 is a wasteful number, since it uses less digits than its factorization.

70431609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634559.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 70431609 is about 8392.3541989122. The cubic root of 70431609 is about 412.9738349325.

The spelling of 70431609 in words is "seventy million, four hundred thirty-one thousand, six hundred nine".