72308351 has 2 divisors, whose sum is σ = 72308352. Its totient is φ = 72308350.

The previous prime is 72308347. The next prime is 72308381. The reversal of 72308351 is 15380327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72308351 - 2² = 72308347 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72308381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36154175 + 36154176.

It is an arithmetic number, because the mean of its divisors is an integer number (36154176).

Almost surely, 2^72308351 is an apocalyptic number.

72308351 is a deficient number, since it is larger than the sum of its proper divisors (1).

72308351 is an equidigital number, since it uses as much as digits as its factorization.

72308351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 72308351 is about 8503.4317190179. The cubic root of 72308351 is about 416.6098039380.

Adding to 72308351 its reverse (15380327), we get a palindrome (87688678).

The spelling of 72308351 in words is "seventy-two million, three hundred eight thousand, three hundred fifty-one".