72070177 has 2 divisors, whose sum is σ = 72070178. Its totient is φ = 72070176.

The previous prime is 72070151. The next prime is 72070181. The reversal of 72070177 is 77107027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 7056 = 8489^2 + 84^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72070177 is a prime.

It is a super-2 number, since 2×72070177² = 10388220825622658, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72070147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035088 + 36035089.

It is an arithmetic number, because the mean of its divisors is an integer number (36035089).

Almost surely, 2^72070177 is an apocalyptic number.

It is an amenable number.

72070177 is a deficient number, since it is larger than the sum of its proper divisors (1).

72070177 is an equidigital number, since it uses as much as digits as its factorization.

72070177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4802, while the sum is 31.

The square root of 72070177 is about 8489.4155864818. The cubic root of 72070177 is about 416.1518818716.

The spelling of 72070177 in words is "seventy-two million, seventy thousand, one hundred seventy-seven".