906913939 has 4 divisors (see below), whose sum is σ = 908254224. Its totient is φ = 905573656.

The previous prime is 906913933. The next prime is 906913949. The reversal of 906913939 is 939319609.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939319609 = 23 ⋅40839983.

It is a cyclic number.

It is not a de Polignac number, because 906913939 - 2⁷ = 906913811 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 906913892 and 906913901.

It is not an unprimeable number, because it can be changed into a prime (906913933) 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, 669127 + ... + 670480.

It is an arithmetic number, because the mean of its divisors is an integer number (227063556).

Almost surely, 2^906913939 is an apocalyptic number.

906913939 is a deficient number, since it is larger than the sum of its proper divisors (1340285).

906913939 is a wasteful number, since it uses less digits than its factorization.

906913939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340284.

The product of its (nonzero) digits is 354294, while the sum is 49.

The square root of 906913939 is about 30115.0118545552. The cubic root of 906913939 is about 967.9554266950.

The spelling of 906913939 in words is "nine hundred six million, nine hundred thirteen thousand, nine hundred thirty-nine".