905001047 has 4 divisors (see below), whose sum is σ = 905120736. Its totient is φ = 904881360.

The previous prime is 905001043. The next prime is 905001049. The reversal of 905001047 is 740100509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740100509 = 23 ⋅32178283.

It is a cyclic number.

It is not a de Polignac number, because 905001047 - 2² = 905001043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905001043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47678 + ... + 63899.

It is an arithmetic number, because the mean of its divisors is an integer number (226280184).

Almost surely, 2^905001047 is an apocalyptic number.

905001047 is a deficient number, since it is larger than the sum of its proper divisors (119689).

905001047 is a wasteful number, since it uses less digits than its factorization.

905001047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119688.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 905001047 is about 30083.2353147064. The cubic root of 905001047 is about 967.2744001007.

The spelling of 905001047 in words is "nine hundred five million, one thousand, forty-seven".