2731429 has 2 divisors, whose sum is σ = 2731430. Its totient is φ = 2731428.

The previous prime is 2731427. The next prime is 2731493. The reversal of 2731429 is 9241372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 74529 = 1630^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731429 - 2¹ = 2731427 is a prime.

Together with 2731427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2731397 and 2731406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2731427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365714 + 1365715.

It is an arithmetic number, because the mean of its divisors is an integer number (1365715).

2^2731429 is an apocalyptic number.

It is an amenable number.

2731429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731429 is an equidigital number, since it uses as much as digits as its factorization.

2731429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 2731429 is about 1652.7035426839. The cubic root of 2731429 is about 139.7858801692.

It can be divided in two parts, 2731 and 429, that added together give a triangular number (3160 = T₇₉).

The spelling of 2731429 in words is "two million, seven hundred thirty-one thousand, four hundred twenty-nine".