2861901949 has 2 divisors, whose sum is σ = 2861901950. Its totient is φ = 2861901948.

The previous prime is 2861901919. The next prime is 2861902013. The reversal of 2861901949 is 9491091682.

It is a happy number.

2861901949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1483636324 + 1378265625 = 38518^2 + 37125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2861901949 - 2⁷ = 2861901821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2861901919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430950974 + 1430950975.

It is an arithmetic number, because the mean of its divisors is an integer number (1430950975).

Almost surely, 2^2861901949 is an apocalyptic number.

It is an amenable number.

2861901949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861901949 is an equidigital number, since it uses as much as digits as its factorization.

2861901949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 2861901949 is about 53496.7470880240. The cubic root of 2861901949 is about 1419.7708333810.

The spelling of 2861901949 in words is "two billion, eight hundred sixty-one million, nine hundred one thousand, nine hundred forty-nine".