72955439 has 4 divisors (see below), whose sum is σ = 73013760. Its totient is φ = 72897120.

The previous prime is 72955427. The next prime is 72955457. The reversal of 72955439 is 93455927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93455927 = 19 ⋅4918733.

It is a cyclic number.

It is not a de Polignac number, because 72955439 - 2¹² = 72951343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72955439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72955469) 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, 27242 + ... + 29799.

It is an arithmetic number, because the mean of its divisors is an integer number (18253440).

Almost surely, 2^72955439 is an apocalyptic number.

72955439 is a deficient number, since it is larger than the sum of its proper divisors (58321).

72955439 is a wasteful number, since it uses less digits than its factorization.

72955439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58320.

The product of its digits is 340200, while the sum is 44.

The square root of 72955439 is about 8541.3956119594. The cubic root of 72955439 is about 417.8488632724.

The spelling of 72955439 in words is "seventy-two million, nine hundred fifty-five thousand, four hundred thirty-nine".