1691169242 has 12 divisors (see below), whose sum is σ = 2950917930. Its totient is φ = 724786776.

The previous prime is 1691169241. The next prime is 1691169253. The reversal of 1691169242 is 2429611961.

It can be written as a sum of positive squares in only one way, i.e., 1604883721 + 86285521 = 40061^2 + 9289^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1691169242.

It is not an unprimeable number, because it can be changed into a prime (1691169241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8628317 + ... + 8628512.

Almost surely, 2^1691169242 is an apocalyptic number.

1691169242 is a deficient number, since it is larger than the sum of its proper divisors (1259748688).

1691169242 is a wasteful number, since it uses less digits than its factorization.

1691169242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256845 (or 17256838 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 1691169242 is about 41123.8281535170. The cubic root of 1691169242 is about 1191.4130618842.

The spelling of 1691169242 in words is "one billion, six hundred ninety-one million, one hundred sixty-nine thousand, two hundred forty-two".