890104261 has 2 divisors, whose sum is σ = 890104262. Its totient is φ = 890104260.

The previous prime is 890104249. The next prime is 890104289. The reversal of 890104261 is 162401098.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 2660161 = 29790^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 890104261 - 2¹³ = 890096069 is a prime.

It is a super-2 number, since 2×890104261² = 1584571190900712242, 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 (890104211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445052130 + 445052131.

It is an arithmetic number, because the mean of its divisors is an integer number (445052131).

Almost surely, 2^890104261 is an apocalyptic number.

It is an amenable number.

890104261 is a deficient number, since it is larger than the sum of its proper divisors (1).

890104261 is an equidigital number, since it uses as much as digits as its factorization.

890104261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 890104261 is about 29834.6151475094. The cubic root of 890104261 is about 961.9377314421.

The spelling of 890104261 in words is "eight hundred ninety million, one hundred four thousand, two hundred sixty-one".