102066491 has 2 divisors, whose sum is σ = 102066492. Its totient is φ = 102066490.

The previous prime is 102066463. The next prime is 102066529. The reversal of 102066491 is 194660201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102066491 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102066421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51033245 + 51033246.

It is an arithmetic number, because the mean of its divisors is an integer number (51033246).

Almost surely, 2^102066491 is an apocalyptic number.

102066491 is a deficient number, since it is larger than the sum of its proper divisors (1).

102066491 is an equidigital number, since it uses as much as digits as its factorization.

102066491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 102066491 is about 10102.7961970932. The cubic root of 102066491 is about 467.3343762109.

The spelling of 102066491 in words is "one hundred two million, sixty-six thousand, four hundred ninety-one".