905901947 has 2 divisors, whose sum is σ = 905901948. Its totient is φ = 905901946.

The previous prime is 905901937. The next prime is 905901949. The reversal of 905901947 is 749109509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 905901947 - 2¹⁰ = 905900923 is a prime.

Together with 905901949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 905901898 and 905901907.

It is not a weakly prime, because it can be changed into another prime (905901949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452950973 + 452950974.

It is an arithmetic number, because the mean of its divisors is an integer number (452950974).

Almost surely, 2^905901947 is an apocalyptic number.

905901947 is a deficient number, since it is larger than the sum of its proper divisors (1).

905901947 is an equidigital number, since it uses as much as digits as its factorization.

905901947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 905901947 is about 30098.2050461485. The cubic root of 905901947 is about 967.5952573762.

The spelling of 905901947 in words is "nine hundred five million, nine hundred one thousand, nine hundred forty-seven".