890971061 has 2 divisors, whose sum is σ = 890971062. Its totient is φ = 890971060.

The previous prime is 890971049. The next prime is 890971069. The reversal of 890971061 is 160179098.

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., 800607025 + 90364036 = 28295^2 + 9506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890971061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890971069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445485530 + 445485531.

It is an arithmetic number, because the mean of its divisors is an integer number (445485531).

Almost surely, 2^890971061 is an apocalyptic number.

It is an amenable number.

890971061 is a deficient number, since it is larger than the sum of its proper divisors (1).

890971061 is an equidigital number, since it uses as much as digits as its factorization.

890971061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 890971061 is about 29849.1383627736. The cubic root of 890971061 is about 962.2498810592.

The spelling of 890971061 in words is "eight hundred ninety million, nine hundred seventy-one thousand, sixty-one".