1689136494 has 32 divisors (see below), whose sum is σ = 3607511040. Its totient is φ = 526092000.

The previous prime is 1689136483. The next prime is 1689136513. The reversal of 1689136494 is 4946319861.

It is a super-2 number, since 2×1689136494² = 5706364190725224072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 151182 + ... + 161969.

It is an arithmetic number, because the mean of its divisors is an integer number (112734720).

Almost surely, 2^1689136494 is an apocalyptic number.

1689136494 is an abundant number, since it is smaller than the sum of its proper divisors (1918374546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1689136494 is a wasteful number, since it uses less digits than its factorization.

1689136494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313216.

The product of its digits is 1119744, while the sum is 51.

The square root of 1689136494 is about 41099.1057566950. The cubic root of 1689136494 is about 1190.9355197907.

The spelling of 1689136494 in words is "one billion, six hundred eighty-nine million, one hundred thirty-six thousand, four hundred ninety-four".