70577581 has 2 divisors, whose sum is σ = 70577582. Its totient is φ = 70577580.

The previous prime is 70577567. The next prime is 70577587. The reversal of 70577581 is 18577507.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36542025 + 34035556 = 6045^2 + 5834^2 .

It is a cyclic number.

It is not a de Polignac number, because 70577581 - 2¹⁵ = 70544813 is a prime.

It is a super-2 number, since 2×70577581² = 9962389879623122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70577587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35288790 + 35288791.

It is an arithmetic number, because the mean of its divisors is an integer number (35288791).

Almost surely, 2^70577581 is an apocalyptic number.

It is an amenable number.

70577581 is a deficient number, since it is larger than the sum of its proper divisors (1).

70577581 is an equidigital number, since it uses as much as digits as its factorization.

70577581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68600, while the sum is 40.

The square root of 70577581 is about 8401.0464229166. The cubic root of 70577581 is about 413.2589390186.

The spelling of 70577581 in words is "seventy million, five hundred seventy-seven thousand, five hundred eighty-one".