145868493 has 4 divisors (see below), whose sum is σ = 194491328. Its totient is φ = 97245660.

The previous prime is 145868417. The next prime is 145868509. The reversal of 145868493 is 394868541.

145868493 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, and also an emirpimes, since its reverse is a distinct semiprime: 394868541 = 3 ⋅131622847.

It is not a de Polignac number, because 145868493 - 2²⁵ = 112314061 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 (145868413) 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, 24311413 + ... + 24311418.

It is an arithmetic number, because the mean of its divisors is an integer number (48622832).

Almost surely, 2^145868493 is an apocalyptic number.

It is an amenable number.

145868493 is a deficient number, since it is larger than the sum of its proper divisors (48622835).

145868493 is an equidigital number, since it uses as much as digits as its factorization.

145868493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48622834.

The product of its digits is 829440, while the sum is 48.

The square root of 145868493 is about 12077.6029492611. The cubic root of 145868493 is about 526.4055975671.

Adding to 145868493 its sum of digits (48), we get a palindrome (145868541).

The spelling of 145868493 in words is "one hundred forty-five million, eight hundred sixty-eight thousand, four hundred ninety-three".