72867397 has 2 divisors, whose sum is σ = 72867398. Its totient is φ = 72867396.

The previous prime is 72867383. The next prime is 72867409. The reversal of 72867397 is 79376827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 33942276 = 6239^2 + 5826^2 .

It is a cyclic number.

It is not a de Polignac number, because 72867397 - 2⁷ = 72867269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72867397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72867497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36433698 + 36433699.

It is an arithmetic number, because the mean of its divisors is an integer number (36433699).

Almost surely, 2^72867397 is an apocalyptic number.

It is an amenable number.

72867397 is a deficient number, since it is larger than the sum of its proper divisors (1).

72867397 is an equidigital number, since it uses as much as digits as its factorization.

72867397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 72867397 is about 8536.2402145207. The cubic root of 72867397 is about 417.6807101338.

The spelling of 72867397 in words is "seventy-two million, eight hundred sixty-seven thousand, three hundred ninety-seven".