491079399 has 8 divisors (see below), whose sum is σ = 654909552. Its totient is φ = 327317760.

The previous prime is 491079367. The next prime is 491079419. The reversal of 491079399 is 993970194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491079399 - 2⁵ = 491079367 is a prime.

It is a super-2 number, since 2×491079399² = 482317952244402402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491079319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2967 + ... + 31479.

It is an arithmetic number, because the mean of its divisors is an integer number (81863694).

Almost surely, 2^491079399 is an apocalyptic number.

491079399 is a deficient number, since it is larger than the sum of its proper divisors (163830153).

491079399 is a wasteful number, since it uses less digits than its factorization.

491079399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34257.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 491079399 is about 22160.3113470908. The cubic root of 491079399 is about 788.9519826333.

The spelling of 491079399 in words is "four hundred ninety-one million, seventy-nine thousand, three hundred ninety-nine".