1690671885 has 16 divisors (see below), whose sum is σ = 3091514496. Its totient is φ = 772878528.

The previous prime is 1690671883. The next prime is 1690671901. The reversal of 1690671885 is 5881760961.

It is not a de Polignac number, because 1690671885 - 2¹ = 1690671883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690671881) 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, 8050714 + ... + 8050923.

It is an arithmetic number, because the mean of its divisors is an integer number (193219656).

Almost surely, 2^1690671885 is an apocalyptic number.

1690671885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1690671885 is a deficient number, since it is larger than the sum of its proper divisors (1400842611).

1690671885 is a wasteful number, since it uses less digits than its factorization.

1690671885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101652.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 1690671885 is about 41117.7806429287. The cubic root of 1690671885 is about 1191.2962559669.

The spelling of 1690671885 in words is "one billion, six hundred ninety million, six hundred seventy-one thousand, eight hundred eighty-five".