72990347 has 2 divisors, whose sum is σ = 72990348. Its totient is φ = 72990346.

The previous prime is 72990341. The next prime is 72990349. The reversal of 72990347 is 74309927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72990347 - 2¹⁶ = 72924811 is a prime.

Together with 72990349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72990341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36495173 + 36495174.

It is an arithmetic number, because the mean of its divisors is an integer number (36495174).

Almost surely, 2^72990347 is an apocalyptic number.

72990347 is a deficient number, since it is larger than the sum of its proper divisors (1).

72990347 is an equidigital number, since it uses as much as digits as its factorization.

72990347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 72990347 is about 8543.4388275448. The cubic root of 72990347 is about 417.9154972913.

It can be divided in two parts, 72990 and 347, that added together give a palindrome (73337).

The spelling of 72990347 in words is "seventy-two million, nine hundred ninety thousand, three hundred forty-seven".