397726088101 has 2 divisors, whose sum is σ = 397726088102. Its totient is φ = 397726088100.

The previous prime is 397726088041. The next prime is 397726088143. The reversal of 397726088101 is 101880627793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376621553025 + 21104535076 = 613695^2 + 145274^2 .

It is a cyclic number.

It is not a de Polignac number, because 397726088101 - 2¹¹ = 397726086053 is a prime.

It is a super-2 number, since 2×397726088101² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397726088701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198863044050 + 198863044051.

It is an arithmetic number, because the mean of its divisors is an integer number (198863044051).

Almost surely, 2^397726088101 is an apocalyptic number.

It is an amenable number.

397726088101 is a deficient number, since it is larger than the sum of its proper divisors (1).

397726088101 is an equidigital number, since it uses as much as digits as its factorization.

397726088101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 397726088101 in words is "three hundred ninety-seven billion, seven hundred twenty-six million, eighty-eight thousand, one hundred one".