4999391 has 2 divisors, whose sum is σ = 4999392. Its totient is φ = 4999390.

The previous prime is 4999387. The next prime is 4999409. The reversal of 4999391 is 1939994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4999391 - 2² = 4999387 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4999301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499695 + 2499696.

It is an arithmetic number, because the mean of its divisors is an integer number (2499696).

Almost surely, 2^4999391 is an apocalyptic number.

4999391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999391 is an equidigital number, since it uses as much as digits as its factorization.

4999391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 44.

The square root of 4999391 is about 2235.9317968131. The cubic root of 4999391 is about 170.9906518834.

The spelling of 4999391 in words is "four million, nine hundred ninety-nine thousand, three hundred ninety-one".