145493893 has 4 divisors (see below), whose sum is σ = 145772608. Its totient is φ = 145215180.

The previous prime is 145493861. The next prime is 145493921. The reversal of 145493893 is 398394541.

It is a happy number.

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: 398394541 = 17 ⋅23434973.

It is a cyclic number.

It is not a de Polignac number, because 145493893 - 2⁵ = 145493861 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 (145493813) 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, 138573 + ... + 139618.

It is an arithmetic number, because the mean of its divisors is an integer number (36443152).

Almost surely, 2^145493893 is an apocalyptic number.

It is an amenable number.

145493893 is a deficient number, since it is larger than the sum of its proper divisors (278715).

145493893 is an equidigital number, since it uses as much as digits as its factorization.

145493893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278714.

The product of its digits is 466560, while the sum is 46.

The square root of 145493893 is about 12062.0849358641. The cubic root of 145493893 is about 525.9545964077.

The spelling of 145493893 in words is "one hundred forty-five million, four hundred ninety-three thousand, eight hundred ninety-three".