807927149 has 4 divisors (see below), whose sum is σ = 807984636. Its totient is φ = 807869664.

The previous prime is 807927119. The next prime is 807927191. The reversal of 807927149 is 941729708.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 385336900 + 422590249 = 19630^2 + 20557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-807927149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (807927119) 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, 7967 + ... + 40979.

It is an arithmetic number, because the mean of its divisors is an integer number (201996159).

Almost surely, 2^807927149 is an apocalyptic number.

It is an amenable number.

807927149 is a deficient number, since it is larger than the sum of its proper divisors (57487).

807927149 is a wasteful number, since it uses less digits than its factorization.

807927149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57486.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 807927149 is about 28424.0593335998. The cubic root of 807927149 is about 931.3739083267.

The spelling of 807927149 in words is "eight hundred seven million, nine hundred twenty-seven thousand, one hundred forty-nine".