491525194 has 4 divisors (see below), whose sum is σ = 737287794. Its totient is φ = 245762596.

The previous prime is 491525189. The next prime is 491525197.

491525194 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 396209025 + 95316169 = 19905^2 + 9763^2 .

It is not an unprimeable number, because it can be changed into a prime (491525197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122881297 + ... + 122881300.

Almost surely, 2^491525194 is an apocalyptic number.

491525194 is a deficient number, since it is larger than the sum of its proper divisors (245762600).

491525194 is a wasteful number, since it uses less digits than its factorization.

491525194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245762599.

The product of its digits is 64800, while the sum is 40.

The square root of 491525194 is about 22170.3674755291. The cubic root of 491525194 is about 789.1906436166.

The spelling of 491525194 in words is "four hundred ninety-one million, five hundred twenty-five thousand, one hundred ninety-four".