72595649 has 4 divisors (see below), whose sum is σ = 82966464. Its totient is φ = 62224836.

The previous prime is 72595597. The next prime is 72595681. The reversal of 72595649 is 94659527.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94659527 = 449 ⋅210823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72595649 is a prime.

It is a super-3 number, since 3×72595649³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72595249) 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, 5185397 + ... + 5185410.

It is an arithmetic number, because the mean of its divisors is an integer number (20741616).

Almost surely, 2^72595649 is an apocalyptic number.

It is an amenable number.

72595649 is a deficient number, since it is larger than the sum of its proper divisors (10370815).

72595649 is a wasteful number, since it uses less digits than its factorization.

72595649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370814.

The product of its digits is 680400, while the sum is 47.

The square root of 72595649 is about 8520.3080343377. The cubic root of 72595649 is about 417.1608375344.

The spelling of 72595649 in words is "seventy-two million, five hundred ninety-five thousand, six hundred forty-nine".