144972493 has 4 divisors (see below), whose sum is σ = 145773628. Its totient is φ = 144171360.

The previous prime is 144972469. The next prime is 144972517. The reversal of 144972493 is 394279441.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (144972469) and next prime (144972517).

It can be written as a sum of positive squares in 2 ways, for example, as 1044484 + 143928009 = 1022^2 + 11997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144972493 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 (144972463) 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, 400296 + ... + 400657.

It is an arithmetic number, because the mean of its divisors is an integer number (36443407).

Almost surely, 2^144972493 is an apocalyptic number.

It is an amenable number.

144972493 is a deficient number, since it is larger than the sum of its proper divisors (801135).

144972493 is an equidigital number, since it uses as much as digits as its factorization.

144972493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801134.

The product of its digits is 217728, while the sum is 43.

The square root of 144972493 is about 12040.4523586118. The cubic root of 144972493 is about 525.3255643572.

The spelling of 144972493 in words is "one hundred forty-four million, nine hundred seventy-two thousand, four hundred ninety-three".