72461297 has 2 divisors, whose sum is σ = 72461298. Its totient is φ = 72461296.

The previous prime is 72461243. The next prime is 72461299. The reversal of 72461297 is 79216427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70040161 + 2421136 = 8369^2 + 1556^2 .

It is an emirp because it is prime and its reverse (79216427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72461297 - 2¹⁴ = 72444913 is a prime.

Together with 72461299, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72461297.

It is not a weakly prime, because it can be changed into another prime (72461299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36230648 + 36230649.

It is an arithmetic number, because the mean of its divisors is an integer number (36230649).

Almost surely, 2^72461297 is an apocalyptic number.

It is an amenable number.

72461297 is a deficient number, since it is larger than the sum of its proper divisors (1).

72461297 is an equidigital number, since it uses as much as digits as its factorization.

72461297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 72461297 is about 8512.4201611528. The cubic root of 72461297 is about 416.9033335654.

The spelling of 72461297 in words is "seventy-two million, four hundred sixty-one thousand, two hundred ninety-seven".