72945263 has 4 divisors (see below), whose sum is σ = 75298368. Its totient is φ = 70592160.

The previous prime is 72945253. The next prime is 72945281. The reversal of 72945263 is 36254927.

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

It is a cyclic number.

It is not a de Polignac number, because 72945263 - 2⁸ = 72945007 is a prime.

It is a super-2 number, since 2×72945263² = 10642022788278338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72945253) 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, 1176506 + ... + 1176567.

It is an arithmetic number, because the mean of its divisors is an integer number (18824592).

Almost surely, 2^72945263 is an apocalyptic number.

72945263 is a deficient number, since it is larger than the sum of its proper divisors (2353105).

72945263 is a wasteful number, since it uses less digits than its factorization.

72945263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353104.

The product of its digits is 90720, while the sum is 38.

The square root of 72945263 is about 8540.7999039903. The cubic root of 72945263 is about 417.8294348477.

The spelling of 72945263 in words is "seventy-two million, nine hundred forty-five thousand, two hundred sixty-three".