2153987447 has 2 divisors, whose sum is σ = 2153987448. Its totient is φ = 2153987446.

The previous prime is 2153987443. The next prime is 2153987471. The reversal of 2153987447 is 7447893512.

2153987447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2153987447 - 2² = 2153987443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2153987395 and 2153987404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2153987443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076993723 + 1076993724.

It is an arithmetic number, because the mean of its divisors is an integer number (1076993724).

Almost surely, 2^2153987447 is an apocalyptic number.

2153987447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153987447 is an equidigital number, since it uses as much as digits as its factorization.

2153987447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 2153987447 is about 46411.0703065551. The cubic root of 2153987447 is about 1291.4602871120.

The spelling of 2153987447 in words is "two billion, one hundred fifty-three million, nine hundred eighty-seven thousand, four hundred forty-seven".