397790101 has 2 divisors, whose sum is σ = 397790102. Its totient is φ = 397790100.

The previous prime is 397790059. The next prime is 397790131. The reversal of 397790101 is 101097793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374461201 + 23328900 = 19351^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 397790101 - 2¹⁵ = 397757333 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 (397790131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198895050 + 198895051.

It is an arithmetic number, because the mean of its divisors is an integer number (198895051).

Almost surely, 2^397790101 is an apocalyptic number.

It is an amenable number.

397790101 is a deficient number, since it is larger than the sum of its proper divisors (1).

397790101 is an equidigital number, since it uses as much as digits as its factorization.

397790101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 397790101 is about 19944.6760063933. The cubic root of 397790101 is about 735.4469036185.

The spelling of 397790101 in words is "three hundred ninety-seven million, seven hundred ninety thousand, one hundred one".