72172363 has 2 divisors, whose sum is σ = 72172364. Its totient is φ = 72172362.

The previous prime is 72172351. The next prime is 72172391. The reversal of 72172363 is 36327127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72172363 is a prime.

It is not a weakly prime, because it can be changed into another prime (72172343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36086181 + 36086182.

It is an arithmetic number, because the mean of its divisors is an integer number (36086182).

Almost surely, 2^72172363 is an apocalyptic number.

72172363 is a deficient number, since it is larger than the sum of its proper divisors (1).

72172363 is an equidigital number, since it uses as much as digits as its factorization.

72172363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 31.

The square root of 72172363 is about 8495.4318901395. The cubic root of 72172363 is about 416.3484718045.

The spelling of 72172363 in words is "seventy-two million, one hundred seventy-two thousand, three hundred sixty-three".