491261336 has 8 divisors (see below), whose sum is σ = 921115020. Its totient is φ = 245630664.

The previous prime is 491261333. The next prime is 491261339. The reversal of 491261336 is 633162194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491261333) and next prime (491261339).

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 491261296 and 491261305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491261333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30703826 + ... + 30703841.

Almost surely, 2^491261336 is an apocalyptic number.

It is an amenable number.

491261336 is a deficient number, since it is larger than the sum of its proper divisors (429853684).

491261336 is a wasteful number, since it uses less digits than its factorization.

491261336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61407673 (or 61407669 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 491261336 is about 22164.4159859898. The cubic root of 491261336 is about 789.0494019335.

The spelling of 491261336 in words is "four hundred ninety-one million, two hundred sixty-one thousand, three hundred thirty-six".