1630731253 has 8 divisors (see below), whose sum is σ = 1686121920. Its totient is φ = 1576084320.

The previous prime is 1630731251. The next prime is 1630731281. The reversal of 1630731253 is 3521370361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1630731253 - 2¹ = 1630731251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630731251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181473 + ... + 190246.

It is an arithmetic number, because the mean of its divisors is an integer number (210765240).

Almost surely, 2^1630731253 is an apocalyptic number.

It is an amenable number.

1630731253 is a deficient number, since it is larger than the sum of its proper divisors (55390667).

1630731253 is a wasteful number, since it uses less digits than its factorization.

1630731253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371867.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 1630731253 is about 40382.3136162355. The cubic root of 1630731253 is about 1177.0478855933.

The spelling of 1630731253 in words is "one billion, six hundred thirty million, seven hundred thirty-one thousand, two hundred fifty-three".