9072457391 has 4 divisors (see below), whose sum is σ = 9075796800. Its totient is φ = 9069117984.

The previous prime is 9072457363. The next prime is 9072457397. The reversal of 9072457391 is 1937542709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1937542709 = 269 ⋅7202761.

It is a cyclic number.

It is not a de Polignac number, because 9072457391 - 2³⁰ = 7998715567 is a prime.

It is a super-2 number, since 2×9072457391² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9072457397) 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, 1665626 + ... + 1671063.

It is an arithmetic number, because the mean of its divisors is an integer number (2268949200).

Almost surely, 2^9072457391 is an apocalyptic number.

9072457391 is a deficient number, since it is larger than the sum of its proper divisors (3339409).

9072457391 is a wasteful number, since it uses less digits than its factorization.

9072457391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339408.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 9072457391 is about 95249.4482451211. The cubic root of 9072457391 is about 2085.6510371211.

The spelling of 9072457391 in words is "nine billion, seventy-two million, four hundred fifty-seven thousand, three hundred ninety-one".