829440091 has 2 divisors, whose sum is σ = 829440092. Its totient is φ = 829440090.

The previous prime is 829440083. The next prime is 829440103. The reversal of 829440091 is 190044928.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 829440091 - 2³ = 829440083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 829440091.

It is not a weakly prime, because it can be changed into another prime (829440791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414720045 + 414720046.

It is an arithmetic number, because the mean of its divisors is an integer number (414720046).

Almost surely, 2^829440091 is an apocalyptic number.

829440091 is a deficient number, since it is larger than the sum of its proper divisors (1).

829440091 is an equidigital number, since it uses as much as digits as its factorization.

829440091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 829440091 is about 28800.0015798611. The cubic root of 829440091 is about 939.5682682413.

The spelling of 829440091 in words is "eight hundred twenty-nine million, four hundred forty thousand, ninety-one".