2471639 has 2 divisors, whose sum is σ = 2471640. Its totient is φ = 2471638.

The previous prime is 2471633. The next prime is 2471663. The reversal of 2471639 is 9361742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2471639 - 2⁸ = 2471383 is a prime.

It is a super-2 number, since 2×2471639² = 12217998692642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2471633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1235819 + 1235820.

It is an arithmetic number, because the mean of its divisors is an integer number (1235820).

2^2471639 is an apocalyptic number.

2471639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2471639 is an equidigital number, since it uses as much as digits as its factorization.

2471639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 2471639 is about 1572.1447134408. The cubic root of 2471639 is about 135.2057037788.

The spelling of 2471639 in words is "two million, four hundred seventy-one thousand, six hundred thirty-nine".