881021137 has 2 divisors, whose sum is σ = 881021138. Its totient is φ = 881021136.

The previous prime is 881021093. The next prime is 881021149. The reversal of 881021137 is 731120188.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524226816 + 356794321 = 22896^2 + 18889^2 .

It is a cyclic number.

It is not a de Polignac number, because 881021137 - 2¹⁵ = 880988369 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 881021099 and 881021108.

It is not a weakly prime, because it can be changed into another prime (881021237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440510568 + 440510569.

It is an arithmetic number, because the mean of its divisors is an integer number (440510569).

Almost surely, 2^881021137 is an apocalyptic number.

It is an amenable number.

881021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

881021137 is an equidigital number, since it uses as much as digits as its factorization.

881021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 881021137 is about 29682.0002189879. Note that the first 3 decimals coincide. The cubic root of 881021137 is about 958.6544869315.

The spelling of 881021137 in words is "eight hundred eighty-one million, twenty-one thousand, one hundred thirty-seven".