491009342 has 8 divisors (see below), whose sum is σ = 736608432. Its totient is φ = 245473200.

The previous prime is 491009339. The next prime is 491009347. The reversal of 491009342 is 243900194.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 491009299 and 491009308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491009347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19967 + ... + 37157.

It is an arithmetic number, because the mean of its divisors is an integer number (92076054).

Almost surely, 2^491009342 is an apocalyptic number.

491009342 is a deficient number, since it is larger than the sum of its proper divisors (245599090).

491009342 is a wasteful number, since it uses less digits than its factorization.

491009342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31474.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 491009342 is about 22158.7306044367. The cubic root of 491009342 is about 788.9144637598.

The spelling of 491009342 in words is "four hundred ninety-one million, nine thousand, three hundred forty-two".