72101597 has 2 divisors, whose sum is σ = 72101598. Its totient is φ = 72101596.

The previous prime is 72101591. The next prime is 72101611. The reversal of 72101597 is 79510127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 89401 = 8486^2 + 299^2 .

It is an emirp because it is prime and its reverse (79510127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72101597 - 2¹⁶ = 72036061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72101591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36050798 + 36050799.

It is an arithmetic number, because the mean of its divisors is an integer number (36050799).

Almost surely, 2^72101597 is an apocalyptic number.

It is an amenable number.

72101597 is a deficient number, since it is larger than the sum of its proper divisors (1).

72101597 is an equidigital number, since it uses as much as digits as its factorization.

72101597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 72101597 is about 8491.2659244662. The cubic root of 72101597 is about 416.2123488265.

The spelling of 72101597 in words is "seventy-two million, one hundred one thousand, five hundred ninety-seven".