383690749 has 16 divisors (see below), whose sum is σ = 418367488. Its totient is φ = 349780032.

The previous prime is 383690729. The next prime is 383690767. The reversal of 383690749 is 947096383.

It is a 8-Lehmer number, since φ(383690749) divides (383690749-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 383690749 - 2⁷ = 383690621 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383690719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506479 + ... + 507235.

It is an arithmetic number, because the mean of its divisors is an integer number (26147968).

Almost surely, 2^383690749 is an apocalyptic number.

It is an amenable number.

383690749 is a deficient number, since it is larger than the sum of its proper divisors (34676739).

383690749 is a wasteful number, since it uses less digits than its factorization.

383690749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 383690749 is about 19588.0256534445. The cubic root of 383690749 is about 726.6530644659.

The spelling of 383690749 in words is "three hundred eighty-three million, six hundred ninety thousand, seven hundred forty-nine".