2139463 has 2 divisors, whose sum is σ = 2139464. Its totient is φ = 2139462.

The previous prime is 2139461. The next prime is 2139481. The reversal of 2139463 is 3649312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139463 - 2¹ = 2139461 is a prime.

Together with 2139461, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069731 + 1069732.

It is an arithmetic number, because the mean of its divisors is an integer number (1069732).

2^2139463 is an apocalyptic number.

2139463 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139463 is an equidigital number, since it uses as much as digits as its factorization.

2139463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 2139463 is about 1462.6903294956. The cubic root of 2139463 is about 128.8550943845.

The spelling of 2139463 in words is "two million, one hundred thirty-nine thousand, four hundred sixty-three".