145723199 has 2 divisors, whose sum is σ = 145723200. Its totient is φ = 145723198.

The previous prime is 145723139. The next prime is 145723241. The reversal of 145723199 is 991327541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145723199 - 2⁸ = 145722943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145723139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72861599 + 72861600.

It is an arithmetic number, because the mean of its divisors is an integer number (72861600).

Almost surely, 2^145723199 is an apocalyptic number.

145723199 is a deficient number, since it is larger than the sum of its proper divisors (1).

145723199 is an equidigital number, since it uses as much as digits as its factorization.

145723199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 145723199 is about 12071.5864326111. The cubic root of 145723199 is about 526.2307620435.

It can be divided in two parts, 14572 and 3199, that added together give a palindrome (17771).

The spelling of 145723199 in words is "one hundred forty-five million, seven hundred twenty-three thousand, one hundred ninety-nine".