72494777 has 2 divisors, whose sum is σ = 72494778. Its totient is φ = 72494776.

The previous prime is 72494761. The next prime is 72494789. The reversal of 72494777 is 77749427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70073641 + 2421136 = 8371^2 + 1556^2 .

It is a cyclic number.

It is not a de Polignac number, because 72494777 - 2⁴ = 72494761 is a prime.

It is not a weakly prime, because it can be changed into another prime (72494707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36247388 + 36247389.

It is an arithmetic number, because the mean of its divisors is an integer number (36247389).

Almost surely, 2^72494777 is an apocalyptic number.

It is an amenable number.

72494777 is a deficient number, since it is larger than the sum of its proper divisors (1).

72494777 is an equidigital number, since it uses as much as digits as its factorization.

72494777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 47.

The square root of 72494777 is about 8514.3864723185. The cubic root of 72494777 is about 416.9675323172.

The spelling of 72494777 in words is "seventy-two million, four hundred ninety-four thousand, seven hundred seventy-seven".