72371123 has 4 divisors (see below), whose sum is σ = 78950328. Its totient is φ = 65791920.

The previous prime is 72371119. The next prime is 72371141. The reversal of 72371123 is 32117327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32117327 = 11 ⋅2919757.

It is a cyclic number.

It is not a de Polignac number, because 72371123 - 2² = 72371119 is a prime.

It is a super-2 number, since 2×72371123² = 10475158888562258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72371092 and 72371101.

It is not an unprimeable number, because it can be changed into a prime (72371113) 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, 3289586 + ... + 3289607.

It is an arithmetic number, because the mean of its divisors is an integer number (19737582).

Almost surely, 2^72371123 is an apocalyptic number.

72371123 is a deficient number, since it is larger than the sum of its proper divisors (6579205).

72371123 is a wasteful number, since it uses less digits than its factorization.

72371123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6579204.

The product of its digits is 1764, while the sum is 26.

The square root of 72371123 is about 8507.1218987387. The cubic root of 72371123 is about 416.7303242118.

The spelling of 72371123 in words is "seventy-two million, three hundred seventy-one thousand, one hundred twenty-three".