1690947311 has 4 divisors (see below), whose sum is σ = 1701072912. Its totient is φ = 1680821712.

The previous prime is 1690947299. The next prime is 1690947319. The reversal of 1690947311 is 1137490961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1137490961 = 17 ⋅66911233.

It is a cyclic number.

It is not a de Polignac number, because 1690947311 - 2²² = 1686753007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690947319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5062550 + ... + 5062883.

It is an arithmetic number, because the mean of its divisors is an integer number (425268228).

Almost surely, 2^1690947311 is an apocalyptic number.

1690947311 is a deficient number, since it is larger than the sum of its proper divisors (10125601).

1690947311 is a wasteful number, since it uses less digits than its factorization.

1690947311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125600.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1690947311 is about 41121.1297388581. The cubic root of 1690947311 is about 1191.3609434933.

The spelling of 1690947311 in words is "one billion, six hundred ninety million, nine hundred forty-seven thousand, three hundred eleven".