491402437 has 8 divisors (see below), whose sum is σ = 502394112. Its totient is φ = 480433200.

The previous prime is 491402393. The next prime is 491402449. The reversal of 491402437 is 734204194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 491402437 - 2²³ = 483013829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491402537) 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, 43387 + ... + 53527.

It is an arithmetic number, because the mean of its divisors is an integer number (62799264).

Almost surely, 2^491402437 is an apocalyptic number.

491402437 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

491402437 is a deficient number, since it is larger than the sum of its proper divisors (10991675).

491402437 is a wasteful number, since it uses less digits than its factorization.

491402437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 491402437 is about 22167.5988099749. The cubic root of 491402437 is about 789.1249387838.

The spelling of 491402437 in words is "four hundred ninety-one million, four hundred two thousand, four hundred thirty-seven".