829215479 has 2 divisors, whose sum is σ = 829215480. Its totient is φ = 829215478.

The previous prime is 829215449. The next prime is 829215487. The reversal of 829215479 is 974512928.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 829215479 - 2⁸ = 829215223 is a prime.

It is a super-2 number, since 2×829215479² = 1375196621226398882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829215419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414607739 + 414607740.

It is an arithmetic number, because the mean of its divisors is an integer number (414607740).

Almost surely, 2^829215479 is an apocalyptic number.

829215479 is a deficient number, since it is larger than the sum of its proper divisors (1).

829215479 is an equidigital number, since it uses as much as digits as its factorization.

829215479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 829215479 is about 28796.1018021537. The cubic root of 829215479 is about 939.4834490311.

The spelling of 829215479 in words is "eight hundred twenty-nine million, two hundred fifteen thousand, four hundred seventy-nine".