72343897 has 4 divisors (see below), whose sum is σ = 72396160. Its totient is φ = 72291636.

The previous prime is 72343883. The next prime is 72343903. The reversal of 72343897 is 79834327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72343897 - 2¹⁹ = 71819609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72343847) 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, 23997 + ... + 26842.

It is an arithmetic number, because the mean of its divisors is an integer number (18099040).

Almost surely, 2^72343897 is an apocalyptic number.

It is an amenable number.

72343897 is a deficient number, since it is larger than the sum of its proper divisors (52263).

72343897 is a wasteful number, since it uses less digits than its factorization.

72343897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52262.

The product of its digits is 254016, while the sum is 43.

The square root of 72343897 is about 8505.5215595518. The cubic root of 72343897 is about 416.6780597063.

The spelling of 72343897 in words is "seventy-two million, three hundred forty-three thousand, eight hundred ninety-seven".