491294942 has 4 divisors (see below), whose sum is σ = 736942416. Its totient is φ = 245647470.

The previous prime is 491294939. The next prime is 491294971. The reversal of 491294942 is 249492194.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 491294893 and 491294902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122823734 + ... + 122823737.

It is an arithmetic number, because the mean of its divisors is an integer number (184235604).

Almost surely, 2^491294942 is an apocalyptic number.

491294942 is a deficient number, since it is larger than the sum of its proper divisors (245647474).

491294942 is a wasteful number, since it uses less digits than its factorization.

491294942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245647473.

The product of its digits is 186624, while the sum is 44.

The square root of 491294942 is about 22165.1740800744. The cubic root of 491294942 is about 789.0673938437.

The spelling of 491294942 in words is "four hundred ninety-one million, two hundred ninety-four thousand, nine hundred forty-two".