70912169 has 2 divisors, whose sum is σ = 70912170. Its totient is φ = 70912168.

The previous prime is 70912099. The next prime is 70912187. The reversal of 70912169 is 96121907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 6190144 = 8045^2 + 2488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70912169 is a prime.

It is a super-2 number, since 2×70912169² = 10057071424569122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70912189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35456084 + 35456085.

It is an arithmetic number, because the mean of its divisors is an integer number (35456085).

Almost surely, 2^70912169 is an apocalyptic number.

It is an amenable number.

70912169 is a deficient number, since it is larger than the sum of its proper divisors (1).

70912169 is an equidigital number, since it uses as much as digits as its factorization.

70912169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 70912169 is about 8420.9363493616. The cubic root of 70912169 is about 413.9109569910.

The spelling of 70912169 in words is "seventy million, nine hundred twelve thousand, one hundred sixty-nine".