3124920949 has 4 divisors (see below), whose sum is σ = 3134905036. Its totient is φ = 3114936864.

The previous prime is 3124920923. The next prime is 3124920989. The reversal of 3124920949 is 9490294213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 432348849 + 2692572100 = 20793^2 + 51890^2 .

It is a cyclic number.

It is not a de Polignac number, because 3124920949 - 2⁵ = 3124920917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3124920989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4991574 + ... + 4992199.

It is an arithmetic number, because the mean of its divisors is an integer number (783726259).

Almost surely, 2^3124920949 is an apocalyptic number.

It is an amenable number.

3124920949 is a deficient number, since it is larger than the sum of its proper divisors (9984087).

3124920949 is an equidigital number, since it uses as much as digits as its factorization.

3124920949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9984086.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 3124920949 is about 55900.9923793845. The cubic root of 3124920949 is about 1461.9965411878.

The spelling of 3124920949 in words is "three billion, one hundred twenty-four million, nine hundred twenty thousand, nine hundred forty-nine".