781630233 has 16 divisors (see below), whose sum is σ = 1111910976. Its totient is φ = 486686720.

The previous prime is 781630231. The next prime is 781630247. The reversal of 781630233 is 332036187.

It is a cyclic number.

It is not a de Polignac number, because 781630233 - 2¹ = 781630231 is a prime.

It is a super-2 number, since 2×781630233² = 1221891642279268578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781630194 and 781630203.

It is not an unprimeable number, because it can be changed into a prime (781630231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51816 + ... + 65177.

It is an arithmetic number, because the mean of its divisors is an integer number (69494436).

Almost surely, 2^781630233 is an apocalyptic number.

It is an amenable number.

781630233 is a deficient number, since it is larger than the sum of its proper divisors (330280743).

781630233 is a wasteful number, since it uses less digits than its factorization.

781630233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117144.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 781630233 is about 27957.6507060232. The cubic root of 781630233 is about 921.1572680634.

The spelling of 781630233 in words is "seven hundred eighty-one million, six hundred thirty thousand, two hundred thirty-three".