70144409 has 4 divisors (see below), whose sum is σ = 73836240. Its totient is φ = 66452580.

The previous prime is 70144381. The next prime is 70144421. The reversal of 70144409 is 90444107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70144409 - 2¹² = 70140313 is a prime.

It is a super-2 number, since 2×70144409² = 9840476227918562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70144429) 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, 1845887 + ... + 1845924.

It is an arithmetic number, because the mean of its divisors is an integer number (18459060).

Almost surely, 2^70144409 is an apocalyptic number.

It is an amenable number.

70144409 is a deficient number, since it is larger than the sum of its proper divisors (3691831).

70144409 is a wasteful number, since it uses less digits than its factorization.

70144409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691830.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 70144409 is about 8375.2259074009. The cubic root of 70144409 is about 412.4117404070.

The spelling of 70144409 in words is "seventy million, one hundred forty-four thousand, four hundred nine".