4648991 has 2 divisors, whose sum is σ = 4648992. Its totient is φ = 4648990.

The previous prime is 4648979. The next prime is 4648997. The reversal of 4648991 is 1998464.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4648991 - 2¹⁸ = 4386847 is a prime.

It is a super-2 number, since 2×4648991² = 43226234636162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4648997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2324495 + 2324496.

It is an arithmetic number, because the mean of its divisors is an integer number (2324496).

Almost surely, 2^4648991 is an apocalyptic number.

4648991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4648991 is an equidigital number, since it uses as much as digits as its factorization.

4648991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 4648991 is about 2156.1518963190. The cubic root of 4648991 is about 166.8986799802.

The spelling of 4648991 in words is "four million, six hundred forty-eight thousand, nine hundred ninety-one".