3906691923 has 4 divisors (see below), whose sum is σ = 5208922568. Its totient is φ = 2604461280.

The previous prime is 3906691909. The next prime is 3906691939. The reversal of 3906691923 is 3291966093.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3906691923 - 2¹⁷ = 3906560851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906611923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651115318 + ... + 651115323.

It is an arithmetic number, because the mean of its divisors is an integer number (1302230642).

Almost surely, 2^3906691923 is an apocalyptic number.

3906691923 is a deficient number, since it is larger than the sum of its proper divisors (1302230645).

3906691923 is a wasteful number, since it uses less digits than its factorization.

3906691923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302230644.

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 3906691923 is about 62503.5352840141. The cubic root of 3906691923 is about 1574.9607008587.

The spelling of 3906691923 in words is "three billion, nine hundred six million, six hundred ninety-one thousand, nine hundred twenty-three".