193951 has 2 divisors, whose sum is σ = 193952. Its totient is φ = 193950.

The previous prime is 193943. The next prime is 193957. The reversal of 193951 is 159391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193951 - 2³ = 193943 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193957) 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 as a sum of consecutive naturals, namely, 96975 + 96976.

It is an arithmetic number, because the mean of its divisors is an integer number (96976).

2¹⁹³⁹⁵¹ is an apocalyptic number.

193951 is a deficient number, since it is larger than the sum of its proper divisors (1).

193951 is an equidigital number, since it uses as much as digits as its factorization.

193951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 28.

The square root of 193951 is about 440.3986830135. The cubic root of 193951 is about 57.8847294432.

It can be divided in two parts, 1939 and 51, that multiplied together give a palindrome (98889).

The spelling of 193951 in words is "one hundred ninety-three thousand, nine hundred fifty-one".