905145893 has 2 divisors, whose sum is σ = 905145894. Its totient is φ = 905145892.

The previous prime is 905145869. The next prime is 905145937. The reversal of 905145893 is 398541509.

It is a happy number.

It is an a-pointer prime, because the next prime (905145937) can be obtained adding 905145893 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 897182209 + 7963684 = 29953^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 905145893 - 2¹⁰ = 905144869 is a prime.

It is a super-2 number, since 2×905145893² = 1638578175229534898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905145803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452572946 + 452572947.

It is an arithmetic number, because the mean of its divisors is an integer number (452572947).

Almost surely, 2^905145893 is an apocalyptic number.

It is an amenable number.

905145893 is a deficient number, since it is larger than the sum of its proper divisors (1).

905145893 is an equidigital number, since it uses as much as digits as its factorization.

905145893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 905145893 is about 30085.6426389732. The cubic root of 905145893 is about 967.3260016446.

The spelling of 905145893 in words is "nine hundred five million, one hundred forty-five thousand, eight hundred ninety-three".