168631142 has 4 divisors (see below), whose sum is σ = 252946716. Its totient is φ = 84315570.

The previous prime is 168631139. The next prime is 168631153. The reversal of 168631142 is 241136861.

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

It is a junction number, because it is equal to n+sod(n) for n = 168631099 and 168631108.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42157784 + ... + 42157787.

It is an arithmetic number, because the mean of its divisors is an integer number (63236679).

Almost surely, 2^168631142 is an apocalyptic number.

168631142 is a deficient number, since it is larger than the sum of its proper divisors (84315574).

168631142 is an equidigital number, since it uses as much as digits as its factorization.

168631142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84315573.

The product of its digits is 6912, while the sum is 32.

The square root of 168631142 is about 12985.8054043636. The cubic root of 168631142 is about 552.4749531038.

The spelling of 168631142 in words is "one hundred sixty-eight million, six hundred thirty-one thousand, one hundred forty-two".