495138897 has 18 divisors (see below), whose sum is σ = 786131346. Its totient is φ = 300083520.

The previous prime is 495138893. The next prime is 495138901. The reversal of 495138897 is 798831594.

495138897 is a `hidden beast` number, since 49 + 513 + 8 + 89 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (495138893) and next prime (495138901).

It can be written as a sum of positive squares in only one way, i.e., 414570321 + 80568576 = 20361^2 + 8976^2 .

It is not a de Polignac number, because 495138897 - 2² = 495138893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (495138893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 226248 + ... + 228425.

Almost surely, 2^495138897 is an apocalyptic number.

It is an amenable number.

495138897 is a deficient number, since it is larger than the sum of its proper divisors (290992449).

495138897 is a wasteful number, since it uses less digits than its factorization.

495138897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454701 (or 454687 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 495138897 is about 22251.7167202892. The cubic root of 495138897 is about 791.1199715953.

The spelling of 495138897 in words is "four hundred ninety-five million, one hundred thirty-eight thousand, eight hundred ninety-seven".