2649431 has 2 divisors, whose sum is σ = 2649432. Its totient is φ = 2649430.

The previous prime is 2649421. The next prime is 2649473. The reversal of 2649431 is 1349462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2649431 is a prime.

It is a super-2 number, since 2×2649431² = 14038969247522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2649394 and 2649403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324715 + 1324716.

It is an arithmetic number, because the mean of its divisors is an integer number (1324716).

2^2649431 is an apocalyptic number.

2649431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649431 is an equidigital number, since it uses as much as digits as its factorization.

2649431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 2649431 is about 1627.7072832669. The cubic root of 2649431 is about 138.3728452800.

The spelling of 2649431 in words is "two million, six hundred forty-nine thousand, four hundred thirty-one".