72949249 has 4 divisors (see below), whose sum is σ = 72986836. Its totient is φ = 72911664.

The previous prime is 72949243. The next prime is 72949259. The reversal of 72949249 is 94294927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 55577025 = 4168^2 + 7455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72949249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72949199 and 72949208.

It is not an unprimeable number, because it can be changed into a prime (72949243) 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, 15714 + ... + 19819.

It is an arithmetic number, because the mean of its divisors is an integer number (18246709).

Almost surely, 2^72949249 is an apocalyptic number.

It is an amenable number.

72949249 is a deficient number, since it is larger than the sum of its proper divisors (37587).

72949249 is a wasteful number, since it uses less digits than its factorization.

72949249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37586.

The product of its digits is 326592, while the sum is 46.

The square root of 72949249 is about 8541.0332513110. The cubic root of 72949249 is about 417.8370452930.

The spelling of 72949249 in words is "seventy-two million, nine hundred forty-nine thousand, two hundred forty-nine".