169240397 has 2 divisors, whose sum is σ = 169240398. Its totient is φ = 169240396.

The previous prime is 169240381. The next prime is 169240451. The reversal of 169240397 is 793042961.

169240397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150283081 + 18957316 = 12259^2 + 4354^2 .

It is a cyclic number.

It is not a de Polignac number, because 169240397 - 2⁴ = 169240381 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 (169240307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84620198 + 84620199.

It is an arithmetic number, because the mean of its divisors is an integer number (84620199).

Almost surely, 2^169240397 is an apocalyptic number.

It is an amenable number.

169240397 is a deficient number, since it is larger than the sum of its proper divisors (1).

169240397 is an equidigital number, since it uses as much as digits as its factorization.

169240397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 169240397 is about 13009.2427527508. The cubic root of 169240397 is about 553.1395072408.

The spelling of 169240397 in words is "one hundred sixty-nine million, two hundred forty thousand, three hundred ninety-seven".