1690918343 has 8 divisors (see below), whose sum is σ = 1751684736. Its totient is φ = 1630540800.

The previous prime is 1690918337. The next prime is 1690918363. The reversal of 1690918343 is 3438190961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1690918343 - 2⁶ = 1690918279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1690918294 and 1690918303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690918363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88346 + ... + 105767.

It is an arithmetic number, because the mean of its divisors is an integer number (218960592).

Almost surely, 2^1690918343 is an apocalyptic number.

1690918343 is a deficient number, since it is larger than the sum of its proper divisors (60766393).

1690918343 is a wasteful number, since it uses less digits than its factorization.

1690918343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194425.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1690918343 is about 41120.7775096726. Note that the first 3 decimals coincide. The cubic root of 1690918343 is about 1191.3541402967.

The spelling of 1690918343 in words is "one billion, six hundred ninety million, nine hundred eighteen thousand, three hundred forty-three".