72092681 has 2 divisors, whose sum is σ = 72092682. Its totient is φ = 72092680.

The previous prime is 72092659. The next prime is 72092711. The reversal of 72092681 is 18629027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 26988025 = 6716^2 + 5195^2 .

It is an emirp because it is prime and its reverse (18629027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72092681 - 2⁶ = 72092617 is a prime.

It is a super-2 number, since 2×72092681² = 10394709307535522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72092611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36046340 + 36046341.

It is an arithmetic number, because the mean of its divisors is an integer number (36046341).

Almost surely, 2^72092681 is an apocalyptic number.

It is an amenable number.

72092681 is a deficient number, since it is larger than the sum of its proper divisors (1).

72092681 is an equidigital number, since it uses as much as digits as its factorization.

72092681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 72092681 is about 8490.7408981784. The cubic root of 72092681 is about 416.1951920069.

The spelling of 72092681 in words is "seventy-two million, ninety-two thousand, six hundred eighty-one".