808978149 has 48 divisors (see below), whose sum is σ = 1401753600. Its totient is φ = 439563168.

The previous prime is 808978123. The next prime is 808978151. The reversal of 808978149 is 941879808.

It is not a de Polignac number, because 808978149 - 2¹³ = 808969957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 808978095 and 808978104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808978109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257812 + ... + 260930.

It is an arithmetic number, because the mean of its divisors is an integer number (29203200).

Almost surely, 2^808978149 is an apocalyptic number.

It is an amenable number.

808978149 is a deficient number, since it is larger than the sum of its proper divisors (592775451).

808978149 is a wasteful number, since it uses less digits than its factorization.

808978149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334 (or 3331 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 808978149 is about 28442.5411839378. The cubic root of 808978149 is about 931.7775956419. Note that the first 3 decimals are identical.

The spelling of 808978149 in words is "eight hundred eight million, nine hundred seventy-eight thousand, one hundred forty-nine".