168477939 has 48 divisors (see below), whose sum is σ = 300837888. Its totient is φ = 88655616.

The previous prime is 168477923. The next prime is 168477943. The reversal of 168477939 is 939774861.

168477939 = 1292² + 1293² + ... + 1385².

It is a happy number.

168477939 is a `hidden beast` number, since 168 + 477 + 9 + 3 + 9 = 666.

It is not a de Polignac number, because 168477939 - 2⁴ = 168477923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168477949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48664 + ... + 52010.

It is an arithmetic number, because the mean of its divisors is an integer number (6267456).

Almost surely, 2^168477939 is an apocalyptic number.

168477939 is a deficient number, since it is larger than the sum of its proper divisors (132359949).

168477939 is a wasteful number, since it uses less digits than its factorization.

168477939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 3421 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 168477939 is about 12979.9051999620. The cubic root of 168477939 is about 552.3075928236.

The spelling of 168477939 in words is "one hundred sixty-eight million, four hundred seventy-seven thousand, nine hundred thirty-nine".