1690542919 has 4 divisors (see below), whose sum is σ = 1820584696. Its totient is φ = 1560501144.

The previous prime is 1690542877. The next prime is 1690542929. The reversal of 1690542919 is 9192450961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1690542919 - 2²¹ = 1688445767 is a prime.

It is a super-2 number, since 2×1690542919² = 5715870721962081122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690542929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65020869 + ... + 65020894.

It is an arithmetic number, because the mean of its divisors is an integer number (455146174).

Almost surely, 2^1690542919 is an apocalyptic number.

1690542919 is a deficient number, since it is larger than the sum of its proper divisors (130041777).

1690542919 is a wasteful number, since it uses less digits than its factorization.

1690542919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130041776.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 1690542919 is about 41116.2123620355. The cubic root of 1690542919 is about 1191.2659641401.

The spelling of 1690542919 in words is "one billion, six hundred ninety million, five hundred forty-two thousand, nine hundred nineteen".