90861041 has 2 divisors, whose sum is σ = 90861042. Its totient is φ = 90861040.

The previous prime is 90861019. The next prime is 90861053. The reversal of 90861041 is 14016809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90649441 + 211600 = 9521^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90861041 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90860995 and 90861013.

It is not a weakly prime, because it can be changed into another prime (90861941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45430520 + 45430521.

It is an arithmetic number, because the mean of its divisors is an integer number (45430521).

Almost surely, 2^90861041 is an apocalyptic number.

It is an amenable number.

90861041 is a deficient number, since it is larger than the sum of its proper divisors (1).

90861041 is an equidigital number, since it uses as much as digits as its factorization.

90861041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 90861041 is about 9532.1058009235. The cubic root of 90861041 is about 449.5650793773.

The spelling of 90861041 in words is "ninety million, eight hundred sixty-one thousand, forty-one".