1630684953 has 20 divisors (see below), whose sum is σ = 2455157760. Its totient is φ = 1078556472.

The previous prime is 1630684943. The next prime is 1630684961. The reversal of 1630684953 is 3594860361.

1630684953 is a `hidden beast` number, since 1 + 630 + 6 + 8 + 4 + 9 + 5 + 3 = 666.

It is not a de Polignac number, because 1630684953 - 2⁵ = 1630684921 is a prime.

It is a super-2 number, since 2×1630684953² = 5318266831881224418, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1630684899 and 1630684908.

It is not an unprimeable number, because it can be changed into a prime (1630684943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68973 + ... + 89546.

It is an arithmetic number, because the mean of its divisors is an integer number (122757888).

Almost surely, 2^1630684953 is an apocalyptic number.

It is an amenable number.

1630684953 is a deficient number, since it is larger than the sum of its proper divisors (824472807).

1630684953 is a wasteful number, since it uses less digits than its factorization.

1630684953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158658 (or 158649 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 1630684953 is about 40381.7403413969. The cubic root of 1630684953 is about 1177.0367458397.

The spelling of 1630684953 in words is "one billion, six hundred thirty million, six hundred eighty-four thousand, nine hundred fifty-three".