681890289 has 16 divisors (see below), whose sum is σ = 931920960. Its totient is φ = 443361600.

The previous prime is 681890273. The next prime is 681890303. The reversal of 681890289 is 982098186.

It is not a de Polignac number, because 681890289 - 2⁴ = 681890273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681890249) 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, 3507 + ... + 37095.

It is an arithmetic number, because the mean of its divisors is an integer number (58245060).

Almost surely, 2^681890289 is an apocalyptic number.

It is an amenable number.

681890289 is a deficient number, since it is larger than the sum of its proper divisors (250030671).

681890289 is a wasteful number, since it uses less digits than its factorization.

681890289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33760.

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 681890289 is about 26113.0291042613. The cubic root of 681890289 is about 880.1800118143.

The spelling of 681890289 in words is "six hundred eighty-one million, eight hundred ninety thousand, two hundred eighty-nine".