76779401 has 2 divisors, whose sum is σ = 76779402. Its totient is φ = 76779400.

The previous prime is 76779379. The next prime is 76779421. The reversal of 76779401 is 10497767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69222400 + 7557001 = 8320^2 + 2749^2 .

It is a cyclic number.

It is not a de Polignac number, because 76779401 - 2⁶ = 76779337 is a prime.

It is not a weakly prime, because it can be changed into another prime (76779421) 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, 38389700 + 38389701.

It is an arithmetic number, because the mean of its divisors is an integer number (38389701).

Almost surely, 2^76779401 is an apocalyptic number.

It is an amenable number.

76779401 is a deficient number, since it is larger than the sum of its proper divisors (1).

76779401 is an equidigital number, since it uses as much as digits as its factorization.

76779401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 76779401 is about 8762.3855769990. The cubic root of 76779401 is about 425.0254213168.

The spelling of 76779401 in words is "seventy-six million, seven hundred seventy-nine thousand, four hundred one".