397554872237 has 2 divisors, whose sum is σ = 397554872238. Its totient is φ = 397554872236.

The previous prime is 397554872201. The next prime is 397554872243. The reversal of 397554872237 is 732278455793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255013890121 + 142540982116 = 504989^2 + 377546^2 .

It is a cyclic number.

It is not a de Polignac number, because 397554872237 - 2³⁰ = 396481130413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397554872237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397553872237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198777436118 + 198777436119.

It is an arithmetic number, because the mean of its divisors is an integer number (198777436119).

Almost surely, 2^397554872237 is an apocalyptic number.

It is an amenable number.

397554872237 is a deficient number, since it is larger than the sum of its proper divisors (1).

397554872237 is an equidigital number, since it uses as much as digits as its factorization.

397554872237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88905600, while the sum is 62.

The spelling of 397554872237 in words is "three hundred ninety-seven billion, five hundred fifty-four million, eight hundred seventy-two thousand, two hundred thirty-seven".