491674237 has 2 divisors, whose sum is σ = 491674238. Its totient is φ = 491674236.

The previous prime is 491674201. The next prime is 491674247. The reversal of 491674237 is 732476194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250462276 + 241211961 = 15826^2 + 15531^2 .

It is a cyclic number.

It is not a de Polignac number, because 491674237 - 2¹¹ = 491672189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491674193 and 491674202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491674247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245837118 + 245837119.

It is an arithmetic number, because the mean of its divisors is an integer number (245837119).

Almost surely, 2^491674237 is an apocalyptic number.

It is an amenable number.

491674237 is a deficient number, since it is larger than the sum of its proper divisors (1).

491674237 is an equidigital number, since it uses as much as digits as its factorization.

491674237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 491674237 is about 22173.7285317558. The cubic root of 491674237 is about 789.2704031458.

The spelling of 491674237 in words is "four hundred ninety-one million, six hundred seventy-four thousand, two hundred thirty-seven".