72383449 has 4 divisors (see below), whose sum is σ = 74879460. Its totient is φ = 69887440.

The previous prime is 72383447. The next prime is 72383459. The reversal of 72383449 is 94438327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94438327 = 97 ⋅973591.

It can be written as a sum of positive squares in 2 ways, for example, as 38975049 + 33408400 = 6243^2 + 5780^2 .

It is a cyclic number.

It is not a de Polignac number, because 72383449 - 2¹ = 72383447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72383447) 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, 1247962 + ... + 1248019.

It is an arithmetic number, because the mean of its divisors is an integer number (18719865).

Almost surely, 2^72383449 is an apocalyptic number.

It is an amenable number.

72383449 is a deficient number, since it is larger than the sum of its proper divisors (2496011).

72383449 is a wasteful number, since it uses less digits than its factorization.

72383449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496010.

The product of its digits is 145152, while the sum is 40.

The square root of 72383449 is about 8507.8463197216. The cubic root of 72383449 is about 416.7539815592.

The spelling of 72383449 in words is "seventy-two million, three hundred eighty-three thousand, four hundred forty-nine".