690881854 has 16 divisors (see below), whose sum is σ = 1117308528. Its totient is φ = 318506112.

The previous prime is 690881837. The next prime is 690881869. The reversal of 690881854 is 458188096.

It is a junction number, because it is equal to n+sod(n) for n = 690881798 and 690881807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8934 + ... + 38230.

It is an arithmetic number, because the mean of its divisors is an integer number (69831783).

Almost surely, 2^690881854 is an apocalyptic number.

690881854 is a deficient number, since it is larger than the sum of its proper divisors (426426674).

690881854 is a wasteful number, since it uses less digits than its factorization.

690881854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30219.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 690881854 is about 26284.6315172954. The cubic root of 690881854 is about 884.0318837759.

The spelling of 690881854 in words is "six hundred ninety million, eight hundred eighty-one thousand, eight hundred fifty-four".