162451993 has 4 divisors (see below), whose sum is σ = 177220368. Its totient is φ = 147683620.

The previous prime is 162451973. The next prime is 162452009. The reversal of 162451993 is 399154261.

162451993 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 162451993 - 2⁹ = 162451481 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162451903) 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, 7384171 + ... + 7384192.

It is an arithmetic number, because the mean of its divisors is an integer number (44305092).

Almost surely, 2^162451993 is an apocalyptic number.

It is an amenable number.

162451993 is a deficient number, since it is larger than the sum of its proper divisors (14768375).

162451993 is a wasteful number, since it uses less digits than its factorization.

162451993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14768374.

The product of its digits is 58320, while the sum is 40.

The square root of 162451993 is about 12745.6656554297. The cubic root of 162451993 is about 545.6426982910.

The spelling of 162451993 in words is "one hundred sixty-two million, four hundred fifty-one thousand, nine hundred ninety-three".