168783957 has 12 divisors (see below), whose sum is σ = 247139724. Its totient is φ = 110980800.

The previous prime is 168783943. The next prime is 168783971. The reversal of 168783957 is 759387861.

It is an interprime number because it is at equal distance from previous prime (168783943) and next prime (168783971).

It can be written as a sum of positive squares in 2 ways, for example, as 46703556 + 122080401 = 6834^2 + 11049^2 .

It is not a de Polignac number, because 168783957 - 2⁶ = 168783893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168783907) 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 11 ways as a sum of consecutive naturals, for example, 127794 + ... + 129107.

It is an arithmetic number, because the mean of its divisors is an integer number (20594977).

Almost surely, 2^168783957 is an apocalyptic number.

It is an amenable number.

168783957 is a deficient number, since it is larger than the sum of its proper divisors (78355767).

168783957 is a wasteful number, since it uses less digits than its factorization.

168783957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256980 (or 256977 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 168783957 is about 12991.6879965615. The cubic root of 168783957 is about 552.6417885790.

The spelling of 168783957 in words is "one hundred sixty-eight million, seven hundred eighty-three thousand, nine hundred fifty-seven".