4635991 has 2 divisors, whose sum is σ = 4635992. Its totient is φ = 4635990.

The previous prime is 4635979. The next prime is 4636003. The reversal of 4635991 is 1995364.

It is a balanced prime because it is at equal distance from previous prime (4635979) and next prime (4636003).

It is a cyclic number.

It is not a de Polignac number, because 4635991 - 2⁷ = 4635863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4635991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4635941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2317995 + 2317996.

It is an arithmetic number, because the mean of its divisors is an integer number (2317996).

Almost surely, 2^4635991 is an apocalyptic number.

4635991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4635991 is an equidigital number, since it uses as much as digits as its factorization.

4635991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 4635991 is about 2153.1351559993. The cubic root of 4635991 is about 166.7429681743.

The spelling of 4635991 in words is "four million, six hundred thirty-five thousand, nine hundred ninety-one".