72974377241 has 2 divisors, whose sum is σ = 72974377242. Its totient is φ = 72974377240.

The previous prime is 72974377127. The next prime is 72974377261. The reversal of 72974377241 is 14277347927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71705592841 + 1268784400 = 267779^2 + 35620^2 .

It is an emirp because it is prime and its reverse (14277347927) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72974377241 is a prime.

It is not a weakly prime, because it can be changed into another prime (72974377261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36487188620 + 36487188621.

It is an arithmetic number, because the mean of its divisors is an integer number (36487188621).

Almost surely, 2^72974377241 is an apocalyptic number.

It is an amenable number.

72974377241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72974377241 is an equidigital number, since it uses as much as digits as its factorization.

72974377241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 53.

The spelling of 72974377241 in words is "seventy-two billion, nine hundred seventy-four million, three hundred seventy-seven thousand, two hundred forty-one".