383742691 has 4 divisors (see below), whose sum is σ = 383851672. Its totient is φ = 383633712.

The previous prime is 383742673. The next prime is 383742731. The reversal of 383742691 is 196247383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196247383 = 2467 ⋅79549.

It is a cyclic number.

It is not a de Polignac number, because 383742691 - 2¹⁵ = 383709923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383742091) 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, 49026 + ... + 56311.

It is an arithmetic number, because the mean of its divisors is an integer number (95962918).

Almost surely, 2^383742691 is an apocalyptic number.

383742691 is a deficient number, since it is larger than the sum of its proper divisors (108981).

383742691 is a wasteful number, since it uses less digits than its factorization.

383742691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108980.

The product of its digits is 217728, while the sum is 43.

The square root of 383742691 is about 19589.3514696123. The cubic root of 383742691 is about 726.6858531206.

The spelling of 383742691 in words is "three hundred eighty-three million, seven hundred forty-two thousand, six hundred ninety-one".