70172369 has 2 divisors, whose sum is σ = 70172370. Its totient is φ = 70172368.

The previous prime is 70172327. The next prime is 70172381. The reversal of 70172369 is 96327107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67650625 + 2521744 = 8225^2 + 1588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70172369 is a prime.

It is a super-2 number, since 2×70172369² = 9848322742144322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70171369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35086184 + 35086185.

It is an arithmetic number, because the mean of its divisors is an integer number (35086185).

Almost surely, 2^70172369 is an apocalyptic number.

It is an amenable number.

70172369 is a deficient number, since it is larger than the sum of its proper divisors (1).

70172369 is an equidigital number, since it uses as much as digits as its factorization.

70172369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 70172369 is about 8376.8949498009. The cubic root of 70172369 is about 412.4665297606.

The spelling of 70172369 in words is "seventy million, one hundred seventy-two thousand, three hundred sixty-nine".