144699857 has 2 divisors, whose sum is σ = 144699858. Its totient is φ = 144699856.

The previous prime is 144699823. The next prime is 144699871. The reversal of 144699857 is 758996441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86192656 + 58507201 = 9284^2 + 7649^2 .

It is a cyclic number.

It is not a de Polignac number, because 144699857 - 2²⁰ = 143651281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144699799 and 144699808.

It is not a weakly prime, because it can be changed into another prime (144699557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72349928 + 72349929.

It is an arithmetic number, because the mean of its divisors is an integer number (72349929).

Almost surely, 2^144699857 is an apocalyptic number.

It is an amenable number.

144699857 is a deficient number, since it is larger than the sum of its proper divisors (1).

144699857 is an equidigital number, since it uses as much as digits as its factorization.

144699857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 144699857 is about 12029.1253630511. The cubic root of 144699857 is about 524.9960477405.

The spelling of 144699857 in words is "one hundred forty-four million, six hundred ninety-nine thousand, eight hundred fifty-seven".