72398693 has 2 divisors, whose sum is σ = 72398694. Its totient is φ = 72398692.

The previous prime is 72398657. The next prime is 72398707. The reversal of 72398693 is 39689327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54140164 + 18258529 = 7358^2 + 4273^2 .

It is a cyclic number.

It is not a de Polignac number, because 72398693 - 2⁸ = 72398437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72398093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36199346 + 36199347.

It is an arithmetic number, because the mean of its divisors is an integer number (36199347).

Almost surely, 2^72398693 is an apocalyptic number.

It is an amenable number.

72398693 is a deficient number, since it is larger than the sum of its proper divisors (1).

72398693 is an equidigital number, since it uses as much as digits as its factorization.

72398693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 72398693 is about 8508.7421514581. The cubic root of 72398693 is about 416.7832357227.

The spelling of 72398693 in words is "seventy-two million, three hundred ninety-eight thousand, six hundred ninety-three".