2144761397 has 4 divisors (see below), whose sum is σ = 2174969376. Its totient is φ = 2114553420.

The previous prime is 2144761391. The next prime is 2144761433. The reversal of 2144761397 is 7931674412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144761397 is a prime.

It is a super-2 number, since 2×2144761397² = 9200002900122783218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144761391) 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, 15103883 + ... + 15104024.

It is an arithmetic number, because the mean of its divisors is an integer number (543742344).

Almost surely, 2^2144761397 is an apocalyptic number.

It is an amenable number.

2144761397 is a deficient number, since it is larger than the sum of its proper divisors (30207979).

2144761397 is an equidigital number, since it uses as much as digits as its factorization.

2144761397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30207978.

The product of its digits is 254016, while the sum is 44.

The square root of 2144761397 is about 46311.5687166824. The cubic root of 2144761397 is about 1289.6137691551.

The spelling of 2144761397 in words is "two billion, one hundred forty-four million, seven hundred sixty-one thousand, three hundred ninety-seven".