72397141 has 4 divisors (see below), whose sum is σ = 72427500. Its totient is φ = 72366784.

The previous prime is 72397133. The next prime is 72397153. The reversal of 72397141 is 14179327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14179327 = 929 ⋅15263.

It can be written as a sum of positive squares in 2 ways, for example, as 26780625 + 45616516 = 5175^2 + 6754^2 .

It is a cyclic number.

It is not a de Polignac number, because 72397141 - 2³ = 72397133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72397097 and 72397106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72397111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11266 + ... + 16483.

It is an arithmetic number, because the mean of its divisors is an integer number (18106875).

Almost surely, 2^72397141 is an apocalyptic number.

It is an amenable number.

72397141 is a deficient number, since it is larger than the sum of its proper divisors (30359).

72397141 is a wasteful number, since it uses less digits than its factorization.

72397141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30358.

The product of its digits is 10584, while the sum is 34.

The square root of 72397141 is about 8508.6509506502. The cubic root of 72397141 is about 416.7802575280.

The spelling of 72397141 in words is "seventy-two million, three hundred ninety-seven thousand, one hundred forty-one".