72353257 has 8 divisors (see below), whose sum is σ = 74221056. Its totient is φ = 70499232.

The previous prime is 72353249. The next prime is 72353279. The reversal of 72353257 is 75235327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72353257 - 2³ = 72353249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72353227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7648 + ... + 14254.

It is an arithmetic number, because the mean of its divisors is an integer number (9277632).

Almost surely, 2^72353257 is an apocalyptic number.

It is an amenable number.

72353257 is a deficient number, since it is larger than the sum of its proper divisors (1867799).

72353257 is a wasteful number, since it uses less digits than its factorization.

72353257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887.

The product of its digits is 44100, while the sum is 34.

The square root of 72353257 is about 8506.0717725634. The cubic root of 72353257 is about 416.6960291486.

The spelling of 72353257 in words is "seventy-two million, three hundred fifty-three thousand, two hundred fifty-seven".