2786431 has 2 divisors, whose sum is σ = 2786432. Its totient is φ = 2786430.

The previous prime is 2786429. The next prime is 2786437. The reversal of 2786431 is 1346872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2786431 - 2¹ = 2786429 is a prime.

It is a super-2 number, since 2×2786431² = 15528395435522, which contains 22 as substring.

Together with 2786429, it forms a pair of twin primes.

2786431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2786393 and 2786402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2786437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393215 + 1393216.

It is an arithmetic number, because the mean of its divisors is an integer number (1393216).

2^2786431 is an apocalyptic number.

2786431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2786431 is an equidigital number, since it uses as much as digits as its factorization.

2786431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 2786431 is about 1669.2606147633. The cubic root of 2786431 is about 140.7179277796.

The spelling of 2786431 in words is "two million, seven hundred eighty-six thousand, four hundred thirty-one".