901861949 has 2 divisors, whose sum is σ = 901861950. Its totient is φ = 901861948.

The previous prime is 901861907. The next prime is 901861997. The reversal of 901861949 is 949168109.

901861949 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., 691321849 + 210540100 = 26293^2 + 14510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-901861949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901864949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450930974 + 450930975.

It is an arithmetic number, because the mean of its divisors is an integer number (450930975).

Almost surely, 2^901861949 is an apocalyptic number.

It is an amenable number.

901861949 is a deficient number, since it is larger than the sum of its proper divisors (1).

901861949 is an equidigital number, since it uses as much as digits as its factorization.

901861949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 901861949 is about 30031.0164496642. The cubic root of 901861949 is about 966.1547378313.

The spelling of 901861949 in words is "nine hundred one million, eight hundred sixty-one thousand, nine hundred forty-nine".