1697650990 has 16 divisors (see below), whose sum is σ = 3492310752. Its totient is φ = 582051744.

The previous prime is 1697650973. The next prime is 1697651017. The reversal of 1697650990 is 990567961.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12126009 + ... + 12126148.

It is an arithmetic number, because the mean of its divisors is an integer number (218269422).

Almost surely, 2^1697650990 is an apocalyptic number.

1697650990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1697650990 is an abundant number, since it is smaller than the sum of its proper divisors (1794659762).

1697650990 is a wasteful number, since it uses less digits than its factorization.

1697650990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24252171.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 1697650990 is about 41202.5604786887. The cubic root of 1697650990 is about 1192.9332318859.

The spelling of 1697650990 in words is "one billion, six hundred ninety-seven million, six hundred fifty thousand, nine hundred ninety".