168137053 has 4 divisors (see below), whose sum is σ = 192156640. Its totient is φ = 144117468.

The previous prime is 168137029. The next prime is 168137083. The reversal of 168137053 is 350731861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350731861 = 31 ⋅11313931.

It is a cyclic number.

It is not a de Polignac number, because 168137053 - 2²⁵ = 134582621 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 (168137003) 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, 12009783 + ... + 12009796.

It is an arithmetic number, because the mean of its divisors is an integer number (48039160).

Almost surely, 2^168137053 is an apocalyptic number.

It is an amenable number.

168137053 is a deficient number, since it is larger than the sum of its proper divisors (24019587).

168137053 is an equidigital number, since it uses as much as digits as its factorization.

168137053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24019586.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 168137053 is about 12966.7672532517. The cubic root of 168137053 is about 551.9348416491.

The spelling of 168137053 in words is "one hundred sixty-eight million, one hundred thirty-seven thousand, fifty-three".