72665093 has 2 divisors, whose sum is σ = 72665094. Its totient is φ = 72665092.

The previous prime is 72665081. The next prime is 72665111. The reversal of 72665093 is 39056627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40934404 + 31730689 = 6398^2 + 5633^2 .

It is an emirp because it is prime and its reverse (39056627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72665093 - 2²² = 68470789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72665393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36332546 + 36332547.

It is an arithmetic number, because the mean of its divisors is an integer number (36332547).

Almost surely, 2^72665093 is an apocalyptic number.

It is an amenable number.

72665093 is a deficient number, since it is larger than the sum of its proper divisors (1).

72665093 is an equidigital number, since it uses as much as digits as its factorization.

72665093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 72665093 is about 8524.3822650090. The cubic root of 72665093 is about 417.2938119174.

The spelling of 72665093 in words is "seventy-two million, six hundred sixty-five thousand, ninety-three".