1634791853 has 2 divisors, whose sum is σ = 1634791854. Its totient is φ = 1634791852.

The previous prime is 1634791849. The next prime is 1634791877. The reversal of 1634791853 is 3581974361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1076036809 + 558755044 = 32803^2 + 23638^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634791853 - 2² = 1634791849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1634791798 and 1634791807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1634791813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817395926 + 817395927.

It is an arithmetic number, because the mean of its divisors is an integer number (817395927).

Almost surely, 2^1634791853 is an apocalyptic number.

It is an amenable number.

1634791853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634791853 is an equidigital number, since it uses as much as digits as its factorization.

1634791853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 1634791853 is about 40432.5593179556. The cubic root of 1634791853 is about 1178.0240446088.

The spelling of 1634791853 in words is "one billion, six hundred thirty-four million, seven hundred ninety-one thousand, eight hundred fifty-three".