72461549 has 2 divisors, whose sum is σ = 72461550. Its totient is φ = 72461548.

The previous prime is 72461533. The next prime is 72461561. The reversal of 72461549 is 94516427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 7739524 = 8045^2 + 2782^2 .

It is a cyclic number.

It is not a de Polignac number, because 72461549 - 2⁴ = 72461533 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72461509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36230774 + 36230775.

It is an arithmetic number, because the mean of its divisors is an integer number (36230775).

Almost surely, 2^72461549 is an apocalyptic number.

It is an amenable number.

72461549 is a deficient number, since it is larger than the sum of its proper divisors (1).

72461549 is an equidigital number, since it uses as much as digits as its factorization.

72461549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 72461549 is about 8512.4349630408. The cubic root of 72461549 is about 416.9038168557.

The spelling of 72461549 in words is "seventy-two million, four hundred sixty-one thousand, five hundred forty-nine".