1690143 has 32 divisors (see below), whose sum is σ = 2860032. Its totient is φ = 864000.

The previous prime is 1690121. The next prime is 1690153. The reversal of 1690143 is 3410961.

It is not a de Polignac number, because 1690143 - 2⁶ = 1690079 is a prime.

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

1690143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11118 + ... + 11268.

It is an arithmetic number, because the mean of its divisors is an integer number (89376).

2^1690143 is an apocalyptic number.

1690143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1690143 is a deficient number, since it is larger than the sum of its proper divisors (1169889).

1690143 is a wasteful number, since it uses less digits than its factorization.

1690143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1690143 is about 1300.0549988366. The cubic root of 1690143 is about 119.1172020461.

The spelling of 1690143 in words is "one million, six hundred ninety thousand, one hundred forty-three".