145899793 has 8 divisors (see below), whose sum is σ = 157812200. Its totient is φ = 134085888.

The previous prime is 145899781. The next prime is 145899827. The reversal of 145899793 is 397998541.

It can be written as a sum of positive squares in 4 ways, for example, as 1106704 + 144793089 = 1052^2 + 12033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145899793 - 2²⁵ = 112345361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145899773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21528 + ... + 27481.

It is an arithmetic number, because the mean of its divisors is an integer number (19726525).

Almost surely, 2^145899793 is an apocalyptic number.

145899793 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145899793 is a deficient number, since it is larger than the sum of its proper divisors (11912407).

145899793 is a wasteful number, since it uses less digits than its factorization.

145899793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49251.

The product of its digits is 2449440, while the sum is 55.

The square root of 145899793 is about 12078.8986666832. The cubic root of 145899793 is about 526.4432463573.

The spelling of 145899793 in words is "one hundred forty-five million, eight hundred ninety-nine thousand, seven hundred ninety-three".