634901 has 2 divisors, whose sum is σ = 634902. Its totient is φ = 634900.

The previous prime is 634891. The next prime is 634903. The reversal of 634901 is 109436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454276 + 180625 = 674^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 634901 - 2¹⁰ = 633877 is a prime.

Together with 634903, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317450 + 317451.

It is an arithmetic number, because the mean of its divisors is an integer number (317451).

2⁶³⁴⁹⁰¹ is an apocalyptic number.

It is an amenable number.

634901 is a deficient number, since it is larger than the sum of its proper divisors (1).

634901 is an equidigital number, since it uses as much as digits as its factorization.

634901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 634901 is about 796.8067519794. The cubic root of 634901 is about 85.9479132946.

The spelling of 634901 in words is "six hundred thirty-four thousand, nine hundred one".