39789749 has 8 divisors (see below), whose sum is σ = 41291712. Its totient is φ = 38314080.

The previous prime is 39789733. The next prime is 39789787. The reversal of 39789749 is 94798793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39789749 - 2⁴ = 39789733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39789694 and 39789703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39789649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3464 + ... + 9569.

It is an arithmetic number, because the mean of its divisors is an integer number (5161464).

Almost surely, 2^39789749 is an apocalyptic number.

It is an amenable number.

39789749 is a deficient number, since it is larger than the sum of its proper divisors (1501963).

39789749 is a wasteful number, since it uses less digits than its factorization.

39789749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13147.

The product of its digits is 3429216, while the sum is 56.

The square root of 39789749 is about 6307.9116195457. The cubic root of 39789749 is about 341.3949294721.

The spelling of 39789749 in words is "thirty-nine million, seven hundred eighty-nine thousand, seven hundred forty-nine".