72741491 has 2 divisors, whose sum is σ = 72741492. Its totient is φ = 72741490.

The previous prime is 72741457. The next prime is 72741497. The reversal of 72741491 is 19414727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72741491 - 2²² = 68547187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (72741497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36370745 + 36370746.

It is an arithmetic number, because the mean of its divisors is an integer number (36370746).

Almost surely, 2^72741491 is an apocalyptic number.

72741491 is a deficient number, since it is larger than the sum of its proper divisors (1).

72741491 is an equidigital number, since it uses as much as digits as its factorization.

72741491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 72741491 is about 8528.8622336159. The cubic root of 72741491 is about 417.4400042872.

The spelling of 72741491 in words is "seventy-two million, seven hundred forty-one thousand, four hundred ninety-one".