634192397 has 2 divisors, whose sum is σ = 634192398. Its totient is φ = 634192396.

The previous prime is 634192381. The next prime is 634192399. The reversal of 634192397 is 793291436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421645156 + 212547241 = 20534^2 + 14579^2 .

It is a cyclic number.

It is not a de Polignac number, because 634192397 - 2⁴ = 634192381 is a prime.

Together with 634192399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634192399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317096198 + 317096199.

It is an arithmetic number, because the mean of its divisors is an integer number (317096199).

Almost surely, 2^634192397 is an apocalyptic number.

It is an amenable number.

634192397 is a deficient number, since it is larger than the sum of its proper divisors (1).

634192397 is an equidigital number, since it uses as much as digits as its factorization.

634192397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 634192397 is about 25183.1768647246. The cubic root of 634192397 is about 859.1592635446.

The spelling of 634192397 in words is "six hundred thirty-four million, one hundred ninety-two thousand, three hundred ninety-seven".