74872397 has 2 divisors, whose sum is σ = 74872398. Its totient is φ = 74872396.

The previous prime is 74872387. The next prime is 74872439. The reversal of 74872397 is 79327847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37589161 + 37283236 = 6131^2 + 6106^2 .

It is a cyclic number.

It is not a de Polignac number, because 74872397 - 2⁴ = 74872381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74872307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37436198 + 37436199.

It is an arithmetic number, because the mean of its divisors is an integer number (37436199).

Almost surely, 2^74872397 is an apocalyptic number.

It is an amenable number.

74872397 is a deficient number, since it is larger than the sum of its proper divisors (1).

74872397 is an equidigital number, since it uses as much as digits as its factorization.

74872397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 74872397 is about 8652.8837389624. The cubic root of 74872397 is about 421.4770312450.

The spelling of 74872397 in words is "seventy-four million, eight hundred seventy-two thousand, three hundred ninety-seven".