72070277 has 2 divisors, whose sum is σ = 72070278. Its totient is φ = 72070276.

The previous prime is 72070241. The next prime is 72070289. The reversal of 72070277 is 77207027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 58081 = 8486^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 72070277 - 2⁶ = 72070213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72070237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035138 + 36035139.

It is an arithmetic number, because the mean of its divisors is an integer number (36035139).

Almost surely, 2^72070277 is an apocalyptic number.

It is an amenable number.

72070277 is a deficient number, since it is larger than the sum of its proper divisors (1).

72070277 is an equidigital number, since it uses as much as digits as its factorization.

72070277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9604, while the sum is 32.

The square root of 72070277 is about 8489.4214761667. The cubic root of 72070277 is about 416.1520743468.

The spelling of 72070277 in words is "seventy-two million, seventy thousand, two hundred seventy-seven".