4921949 has 2 divisors, whose sum is σ = 4921950. Its totient is φ = 4921948.

The previous prime is 4921921. The next prime is 4922011. The reversal of 4921949 is 9491294.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3678724 + 1243225 = 1918^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 4921949 - 2¹² = 4917853 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 (4921919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460974 + 2460975.

It is an arithmetic number, because the mean of its divisors is an integer number (2460975).

Almost surely, 2^4921949 is an apocalyptic number.

It is an amenable number.

4921949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4921949 is an equidigital number, since it uses as much as digits as its factorization.

4921949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 4921949 is about 2218.5465963103. The cubic root of 4921949 is about 170.1031553861.

The spelling of 4921949 in words is "four million, nine hundred twenty-one thousand, nine hundred forty-nine".