1663713253 has 2 divisors, whose sum is σ = 1663713254. Its totient is φ = 1663713252.

The previous prime is 1663713241. The next prime is 1663713281. The reversal of 1663713253 is 3523173661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1636849764 + 26863489 = 40458^2 + 5183^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663713253 - 2⁵ = 1663713221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663773253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831856626 + 831856627.

It is an arithmetic number, because the mean of its divisors is an integer number (831856627).

Almost surely, 2^1663713253 is an apocalyptic number.

It is an amenable number.

1663713253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663713253 is an equidigital number, since it uses as much as digits as its factorization.

1663713253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 1663713253 is about 40788.6412252235. The cubic root of 1663713253 is about 1184.9303555953.

It can be divided in two parts, 16637 and 13253, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 1663713253 in words is "one billion, six hundred sixty-three million, seven hundred thirteen thousand, two hundred fifty-three".