771972101 has 2 divisors, whose sum is σ = 771972102. Its totient is φ = 771972100.

The previous prime is 771972041. The next prime is 771972139. The reversal of 771972101 is 101279177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661827076 + 110145025 = 25726^2 + 10495^2 .

It is a cyclic number.

It is not a de Polignac number, because 771972101 - 2¹⁸ = 771709957 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 (771972001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385986050 + 385986051.

It is an arithmetic number, because the mean of its divisors is an integer number (385986051).

Almost surely, 2^771972101 is an apocalyptic number.

It is an amenable number.

771972101 is a deficient number, since it is larger than the sum of its proper divisors (1).

771972101 is an equidigital number, since it uses as much as digits as its factorization.

771972101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6174, while the sum is 35.

The square root of 771972101 is about 27784.3859208729. The cubic root of 771972101 is about 917.3474718666.

The spelling of 771972101 in words is "seven hundred seventy-one million, nine hundred seventy-two thousand, one hundred one".