1630640033 has 4 divisors (see below), whose sum is σ = 1778880048. Its totient is φ = 1482400020.

The previous prime is 1630639991. The next prime is 1630640113. The reversal of 1630640033 is 3300460361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630640033 is a prime.

It is a super-3 number, since 3×1630640033³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1630639984 and 1630640011.

It is not an unprimeable number, because it can be changed into a prime (1630640533) 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, 74119991 + ... + 74120012.

It is an arithmetic number, because the mean of its divisors is an integer number (444720012).

Almost surely, 2^1630640033 is an apocalyptic number.

It is an amenable number.

1630640033 is a deficient number, since it is larger than the sum of its proper divisors (148240015).

1630640033 is a wasteful number, since it uses less digits than its factorization.

1630640033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148240014.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 1630640033 is about 40381.1841455894. The cubic root of 1630640033 is about 1177.0259379118.

The spelling of 1630640033 in words is "one billion, six hundred thirty million, six hundred forty thousand, thirty-three".