72704351 has 2 divisors, whose sum is σ = 72704352. Its totient is φ = 72704350.

The previous prime is 72704329. The next prime is 72704353. The reversal of 72704351 is 15340727.

It is a strong prime.

It is an emirp because it is prime and its reverse (15340727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72704351 - 2²² = 68510047 is a prime.

Together with 72704353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72704353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36352175 + 36352176.

It is an arithmetic number, because the mean of its divisors is an integer number (36352176).

Almost surely, 2^72704351 is an apocalyptic number.

72704351 is a deficient number, since it is larger than the sum of its proper divisors (1).

72704351 is an equidigital number, since it uses as much as digits as its factorization.

72704351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72704351 is about 8526.6846429313. The cubic root of 72704351 is about 417.3689473572.

The spelling of 72704351 in words is "seventy-two million, seven hundred four thousand, three hundred fifty-one".