461781897 has 16 divisors (see below), whose sum is σ = 652521600. Its totient is φ = 289481472.

The previous prime is 461781883. The next prime is 461781907. The reversal of 461781897 is 798187164.

It is not a de Polignac number, because 461781897 - 2⁸ = 461781641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (461781997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62979 + ... + 69927.

It is an arithmetic number, because the mean of its divisors is an integer number (40782600).

Almost surely, 2^461781897 is an apocalyptic number.

It is an amenable number.

461781897 is a deficient number, since it is larger than the sum of its proper divisors (190739703).

461781897 is a wasteful number, since it uses less digits than its factorization.

461781897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8272.

The product of its digits is 677376, while the sum is 51.

The square root of 461781897 is about 21489.1111263356. Note that the first 4 decimals coincide. The cubic root of 461781897 is about 772.9397360230.

The spelling of 461781897 in words is "four hundred sixty-one million, seven hundred eighty-one thousand, eight hundred ninety-seven".