841491945 has 36 divisors (see below), whose sum is σ = 1696726980. Its totient is φ = 384681024.

The previous prime is 841491943. The next prime is 841492013. The reversal of 841491945 is 549194148.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 477903321 + 363588624 = 21861^2 + 19068^2 .

It is not a de Polignac number, because 841491945 - 2¹ = 841491943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 841491945.

It is not an unprimeable number, because it can be changed into a prime (841491943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188610 + ... + 193019.

It is an arithmetic number, because the mean of its divisors is an integer number (47131305).

Almost surely, 2^841491945 is an apocalyptic number.

It is an amenable number.

841491945 is an abundant number, since it is smaller than the sum of its proper divisors (855235035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

841491945 is a wasteful number, since it uses less digits than its factorization.

841491945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381654 (or 381644 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 841491945 is about 29008.4805703436. The cubic root of 841491945 is about 944.0970799477.

The spelling of 841491945 in words is "eight hundred forty-one million, four hundred ninety-one thousand, nine hundred forty-five".