72310947 has 4 divisors (see below), whose sum is σ = 96414600. Its totient is φ = 48207296.

The previous prime is 72310943. The next prime is 72310951. The reversal of 72310947 is 74901327.

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

It is an interprime number because it is at equal distance from previous prime (72310943) and next prime (72310951).

It is a cyclic number.

It is not a de Polignac number, because 72310947 - 2² = 72310943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72310943) 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, 12051822 + ... + 12051827.

It is an arithmetic number, because the mean of its divisors is an integer number (24103650).

Almost surely, 2^72310947 is an apocalyptic number.

72310947 is a deficient number, since it is larger than the sum of its proper divisors (24103653).

72310947 is a wasteful number, since it uses less digits than its factorization.

72310947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24103652.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 72310947 is about 8503.5843619029. The cubic root of 72310947 is about 416.6147895591.

The spelling of 72310947 in words is "seventy-two million, three hundred ten thousand, nine hundred forty-seven".