491970277 has 4 divisors (see below), whose sum is σ = 492545196. Its totient is φ = 491395360.

The previous prime is 491970257. The next prime is 491970329. The reversal of 491970277 is 772079194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 772079194 = 2 ⋅386039597.

It can be written as a sum of positive squares in 2 ways, for example, as 375351876 + 116618401 = 19374^2 + 10799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491970277 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 (491970257) 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, 286174 + ... + 287887.

It is an arithmetic number, because the mean of its divisors is an integer number (123136299).

Almost surely, 2^491970277 is an apocalyptic number.

It is an amenable number.

491970277 is a deficient number, since it is larger than the sum of its proper divisors (574919).

491970277 is an equidigital number, since it uses as much as digits as its factorization.

491970277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574918.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 491970277 is about 22180.4029945355. The cubic root of 491970277 is about 789.4287795077.

The spelling of 491970277 in words is "four hundred ninety-one million, nine hundred seventy thousand, two hundred seventy-seven".