77272541 has 2 divisors, whose sum is σ = 77272542. Its totient is φ = 77272540.

The previous prime is 77272529. The next prime is 77272549. The reversal of 77272541 is 14527277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 2709316 = 8635^2 + 1646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77272541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77272549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38636270 + 38636271.

It is an arithmetic number, because the mean of its divisors is an integer number (38636271).

Almost surely, 2^77272541 is an apocalyptic number.

It is an amenable number.

77272541 is a deficient number, since it is larger than the sum of its proper divisors (1).

77272541 is an equidigital number, since it uses as much as digits as its factorization.

77272541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 35.

The square root of 77272541 is about 8790.4801347822. The cubic root of 77272541 is about 425.9334335070.

The spelling of 77272541 in words is "seventy-seven million, two hundred seventy-two thousand, five hundred forty-one".