151993 has 4 divisors (see below), whose sum is σ = 156928. Its totient is φ = 147060.

The previous prime is 151969. The next prime is 152003. The reversal of 151993 is 399151.

151993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 151993 - 2¹⁷ = 20921 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 (151903) 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, 2421 + ... + 2482.

It is an arithmetic number, because the mean of its divisors is an integer number (39232).

2¹⁵¹⁹⁹³ is an apocalyptic number.

It is an amenable number.

151993 is a deficient number, since it is larger than the sum of its proper divisors (4935).

151993 is an equidigital number, since it uses as much as digits as its factorization.

151993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934.

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

The square root of 151993 is about 389.8627963784. The cubic root of 151993 is about 53.3672137157.

The spelling of 151993 in words is "one hundred fifty-one thousand, nine hundred ninety-three".