681000190 has 32 divisors (see below), whose sum is σ = 1321500096. Its totient is φ = 251178240.

The previous prime is 681000167. The next prime is 681000191. The reversal of 681000190 is 91000186.

It is a super-2 number, since 2×681000190² = 927522517560072200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681000191) 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, 152895 + ... + 157285.

It is an arithmetic number, because the mean of its divisors is an integer number (41296878).

Almost surely, 2^681000190 is an apocalyptic number.

681000190 is a deficient number, since it is larger than the sum of its proper divisors (640499906).

681000190 is a wasteful number, since it uses less digits than its factorization.

681000190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 681000190 is about 26095.9803418074. The cubic root of 681000190 is about 879.7968668534.

The spelling of 681000190 in words is "six hundred eighty-one million, one hundred ninety", and thus it is an aban number.