901923149 has 2 divisors, whose sum is σ = 901923150. Its totient is φ = 901923148.

The previous prime is 901923109. The next prime is 901923199. The reversal of 901923149 is 941329109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842740900 + 59182249 = 29030^2 + 7693^2 .

It is a cyclic number.

It is not a de Polignac number, because 901923149 - 2²⁰ = 900874573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901923109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450961574 + 450961575.

It is an arithmetic number, because the mean of its divisors is an integer number (450961575).

Almost surely, 2^901923149 is an apocalyptic number.

It is an amenable number.

901923149 is a deficient number, since it is larger than the sum of its proper divisors (1).

901923149 is an equidigital number, since it uses as much as digits as its factorization.

901923149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 901923149 is about 30032.0353789083. The cubic root of 901923149 is about 966.1765916315.

The spelling of 901923149 in words is "nine hundred one million, nine hundred twenty-three thousand, one hundred forty-nine".