70144769 has 4 divisors (see below), whose sum is σ = 70162260. Its totient is φ = 70127280.

The previous prime is 70144759. The next prime is 70144787. The reversal of 70144769 is 96744107.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57577744 + 12567025 = 7588^2 + 3545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70144769 is a prime.

It is a super-2 number, since 2×70144769² = 9840577236126722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70144759) 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, 599 + ... + 11859.

It is an arithmetic number, because the mean of its divisors is an integer number (17540565).

Almost surely, 2^70144769 is an apocalyptic number.

It is an amenable number.

70144769 is a deficient number, since it is larger than the sum of its proper divisors (17491).

70144769 is a wasteful number, since it uses less digits than its factorization.

70144769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 70144769 is about 8375.2473993310. The cubic root of 70144769 is about 412.4124459418.

The spelling of 70144769 in words is "seventy million, one hundred forty-four thousand, seven hundred sixty-nine".