4991403698 has 6 divisors (see below), whose sum is σ = 7487255421. Its totient is φ = 2495651892.

The previous prime is 4991403691. The next prime is 4991403707. The reversal of 4991403698 is 8963041994.

It can be written as a sum of positive squares in 2 ways, for example, as 4676234689 + 315169009 = 68383^2 + 17753^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=49957.

It is a super-2 number, since 2×4991403698² = 49828221752816150408, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991403691) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74936 + ... + 124892.

Almost surely, 2^4991403698 is an apocalyptic number.

4991403698 is a deficient number, since it is larger than the sum of its proper divisors (2495851723).

4991403698 is an frugal number, since it uses more digits than its factorization.

4991403698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99916 (or 49959 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 4991403698 is about 70649.8669354727. The cubic root of 4991403698 is about 1708.9954198915.

The spelling of 4991403698 in words is "four billion, nine hundred ninety-one million, four hundred three thousand, six hundred ninety-eight".