901981127 has 2 divisors, whose sum is σ = 901981128. Its totient is φ = 901981126.

The previous prime is 901981111. The next prime is 901981139. The reversal of 901981127 is 721189109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 901981127 - 2⁴ = 901981111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901981187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450990563 + 450990564.

It is an arithmetic number, because the mean of its divisors is an integer number (450990564).

Almost surely, 2^901981127 is an apocalyptic number.

901981127 is a deficient number, since it is larger than the sum of its proper divisors (1).

901981127 is an equidigital number, since it uses as much as digits as its factorization.

901981127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 901981127 is about 30033.0006326374. Note that the first 3 decimals coincide. The cubic root of 901981127 is about 966.1972939815.

Subtracting from 901981127 its sum of digits (38), we obtain a square (901981089 = 30033²).

The spelling of 901981127 in words is "nine hundred one million, nine hundred eighty-one thousand, one hundred twenty-seven".