901380509 has 2 divisors, whose sum is σ = 901380510. Its totient is φ = 901380508.

The previous prime is 901380497. The next prime is 901380541. The reversal of 901380509 is 905083109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901320484 + 60025 = 30022^2 + 245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-901380509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901380559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450690254 + 450690255.

It is an arithmetic number, because the mean of its divisors is an integer number (450690255).

Almost surely, 2^901380509 is an apocalyptic number.

It is an amenable number.

901380509 is a deficient number, since it is larger than the sum of its proper divisors (1).

901380509 is an equidigital number, since it uses as much as digits as its factorization.

901380509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 901380509 is about 30022.9996669220. Note that the first 3 decimals coincide. The cubic root of 901380509 is about 965.9827867800.

The spelling of 901380509 in words is "nine hundred one million, three hundred eighty thousand, five hundred nine".