1690947874 has 32 divisors (see below), whose sum is σ = 3348314496. Its totient is φ = 620056320.

The previous prime is 1690947859. The next prime is 1690947887. The reversal of 1690947874 is 4787490961.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320329 + ... + 325564.

It is an arithmetic number, because the mean of its divisors is an integer number (104634828).

Almost surely, 2^1690947874 is an apocalyptic number.

1690947874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1690947874 is a deficient number, since it is larger than the sum of its proper divisors (1657366622).

1690947874 is a wasteful number, since it uses less digits than its factorization.

1690947874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645930.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 1690947874 is about 41121.1365844866. The cubic root of 1690947874 is about 1191.3610757142.

The spelling of 1690947874 in words is "one billion, six hundred ninety million, nine hundred forty-seven thousand, eight hundred seventy-four".