70257569 has 2 divisors, whose sum is σ = 70257570. Its totient is φ = 70257568.

The previous prime is 70257541. The next prime is 70257589. The reversal of 70257569 is 96575207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 14531344 = 7465^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 70257569 - 2¹² = 70253473 is a prime.

It is a super-2 number, since 2×70257569² = 9872252003579522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70257529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35128784 + 35128785.

It is an arithmetic number, because the mean of its divisors is an integer number (35128785).

Almost surely, 2^70257569 is an apocalyptic number.

It is an amenable number.

70257569 is a deficient number, since it is larger than the sum of its proper divisors (1).

70257569 is an equidigital number, since it uses as much as digits as its factorization.

70257569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 70257569 is about 8381.9788236430. The cubic root of 70257569 is about 412.6333947521.

The spelling of 70257569 in words is "seventy million, two hundred fifty-seven thousand, five hundred sixty-nine".