6904394149 has 4 divisors (see below), whose sum is σ = 6905617740. Its totient is φ = 6903170560.

The previous prime is 6904394113. The next prime is 6904394171. The reversal of 6904394149 is 9414934096.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4640061924 + 2264332225 = 68118^2 + 47585^2 .

It is a cyclic number.

It is not a de Polignac number, because 6904394149 - 2¹⁷ = 6904263077 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (6904395149) 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, 603292 + ... + 614629.

It is an arithmetic number, because the mean of its divisors is an integer number (1726404435).

Almost surely, 2^6904394149 is an apocalyptic number.

It is an amenable number.

6904394149 is a deficient number, since it is larger than the sum of its proper divisors (1223591).

6904394149 is a wasteful number, since it uses less digits than its factorization.

6904394149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223590.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6904394149 is about 83092.6840883119. The cubic root of 6904394149 is about 1904.1823059328.

The spelling of 6904394149 in words is "six billion, nine hundred four million, three hundred ninety-four thousand, one hundred forty-nine".