1630993 has 8 divisors (see below), whose sum is σ = 2007488. Its totient is φ = 1290384.

The previous prime is 1630987. The next prime is 1631023. The reversal of 1630993 is 3990361.

1630993 = T₁₄₂ + T₁₄₃ + ... + T₂₃₂.

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

It is a cyclic number.

It is not a de Polignac number, because 1630993 - 2¹⁷ = 1499921 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1630913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8871 + ... + 9052.

It is an arithmetic number, because the mean of its divisors is an integer number (250936).

2^1630993 is an apocalyptic number.

1630993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1630993 is a deficient number, since it is larger than the sum of its proper divisors (376495).

1630993 is a wasteful number, since it uses less digits than its factorization.

1630993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1630993 is about 1277.1033630838. The cubic root of 1630993 is about 117.7110857807.

The spelling of 1630993 in words is "one million, six hundred thirty thousand, nine hundred ninety-three".