144776997 has 8 divisors (see below), whose sum is σ = 214484480. Its totient is φ = 96517980.

The previous prime is 144776977. The next prime is 144776999. The reversal of 144776997 is 799677441.

It is not a de Polignac number, because 144776997 - 2⁷ = 144776869 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 (144776999) 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, 2681029 + ... + 2681082.

It is an arithmetic number, because the mean of its divisors is an integer number (26810560).

Almost surely, 2^144776997 is an apocalyptic number.

It is an amenable number.

144776997 is a deficient number, since it is larger than the sum of its proper divisors (69707483).

144776997 is an equidigital number, since it uses as much as digits as its factorization.

144776997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362120 (or 5362114 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 144776997 is about 12032.3313202388. The cubic root of 144776997 is about 525.0893235771.

The spelling of 144776997 in words is "one hundred forty-four million, seven hundred seventy-six thousand, nine hundred ninety-seven".