92720251 has 4 divisors (see below), whose sum is σ = 99852592. Its totient is φ = 85587912.

The previous prime is 92720233. The next prime is 92720317. The reversal of 92720251 is 15202729.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15202729 = 2393 ⋅6353.

It is a cyclic number.

It is not a de Polignac number, because 92720251 - 2⁵ = 92720219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (92720851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566151 + ... + 3566176.

It is an arithmetic number, because the mean of its divisors is an integer number (24963148).

Almost surely, 2^92720251 is an apocalyptic number.

92720251 is a deficient number, since it is larger than the sum of its proper divisors (7132341).

92720251 is a wasteful number, since it uses less digits than its factorization.

92720251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132340.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 92720251 is about 9629.1355271385. The cubic root of 92720251 is about 452.6107515606.

The spelling of 92720251 in words is "ninety-two million, seven hundred twenty thousand, two hundred fifty-one".