4950991 has 2 divisors, whose sum is σ = 4950992. Its totient is φ = 4950990.

The previous prime is 4950971. The next prime is 4951013. The reversal of 4950991 is 1990594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4950991 - 2⁹ = 4950479 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4950991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4950931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475495 + 2475496.

It is an arithmetic number, because the mean of its divisors is an integer number (2475496).

Almost surely, 2^4950991 is an apocalyptic number.

4950991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4950991 is an equidigital number, since it uses as much as digits as its factorization.

4950991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 4950991 is about 2225.0822456709. The cubic root of 4950991 is about 170.4370645163.

It can be divided in two parts, 49 and 50991, that added together give a triangular number (51040 = T₃₁₉).

The spelling of 4950991 in words is "four million, nine hundred fifty thousand, nine hundred ninety-one".