1630985354 has 8 divisors (see below), whose sum is σ = 2471699748. Its totient is φ = 807085440.

The previous prime is 1630985351. The next prime is 1630985357. The reversal of 1630985354 is 4535890361.

It is an interprime number because it is at equal distance from previous prime (1630985351) and next prime (1630985357).

It can be written as a sum of positive squares in 2 ways, for example, as 1558275625 + 72709729 = 39475^2 + 8527^2 .

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

It is a super-2 number, since 2×1630985354² = 5320226449925010632, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1630985351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4203377 + ... + 4203764.

Almost surely, 2^1630985354 is an apocalyptic number.

1630985354 is a deficient number, since it is larger than the sum of its proper divisors (840714394).

1630985354 is an equidigital number, since it uses as much as digits as its factorization.

1630985354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8407240.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1630985354 is about 40385.4596853868. The cubic root of 1630985354 is about 1177.1090183951.

The spelling of 1630985354 in words is "one billion, six hundred thirty million, nine hundred eighty-five thousand, three hundred fifty-four".