881051009 has 4 divisors (see below), whose sum is σ = 902540100. Its totient is φ = 859561920.

The previous prime is 881050987. The next prime is 881051029. The reversal of 881051009 is 900150188.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 436684609 + 444366400 = 20897^2 + 21080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881051009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881051029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10744484 + ... + 10744565.

It is an arithmetic number, because the mean of its divisors is an integer number (225635025).

Almost surely, 2^881051009 is an apocalyptic number.

It is an amenable number.

881051009 is a deficient number, since it is larger than the sum of its proper divisors (21489091).

881051009 is a wasteful number, since it uses less digits than its factorization.

881051009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21489090.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 881051009 is about 29682.5034153119. The cubic root of 881051009 is about 958.6653215574.

The spelling of 881051009 in words is "eight hundred eighty-one million, fifty-one thousand, nine".