72974357 has 2 divisors, whose sum is σ = 72974358. Its totient is φ = 72974356.

The previous prime is 72974339. The next prime is 72974359. The reversal of 72974357 is 75347927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42954916 + 30019441 = 6554^2 + 5479^2 .

It is a cyclic number.

It is not a de Polignac number, because 72974357 - 2¹⁶ = 72908821 is a prime.

Together with 72974359, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72974359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36487178 + 36487179.

It is an arithmetic number, because the mean of its divisors is an integer number (36487179).

Almost surely, 2^72974357 is an apocalyptic number.

It is an amenable number.

72974357 is a deficient number, since it is larger than the sum of its proper divisors (1).

72974357 is an equidigital number, since it uses as much as digits as its factorization.

72974357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 44.

The square root of 72974357 is about 8542.5029704414. The cubic root of 72974357 is about 417.8849774709.

The spelling of 72974357 in words is "seventy-two million, nine hundred seventy-four thousand, three hundred fifty-seven".