72070577 has 2 divisors, whose sum is σ = 72070578. Its totient is φ = 72070576.

The previous prime is 72070573. The next prime is 72070601. The reversal of 72070577 is 77507027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67387681 + 4682896 = 8209^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 72070577 - 2² = 72070573 is a prime.

It is a super-2 number, since 2×72070577² = 10388336138225858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72070573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035288 + 36035289.

It is an arithmetic number, because the mean of its divisors is an integer number (36035289).

Almost surely, 2^72070577 is an apocalyptic number.

It is an amenable number.

72070577 is a deficient number, since it is larger than the sum of its proper divisors (1).

72070577 is an equidigital number, since it uses as much as digits as its factorization.

72070577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24010, while the sum is 35.

The square root of 72070577 is about 8489.4391451968. The cubic root of 72070577 is about 416.1526517714.

The spelling of 72070577 in words is "seventy-two million, seventy thousand, five hundred seventy-seven".