2990998817 has 4 divisors (see below), whose sum is σ = 2993895300. Its totient is φ = 2988102336.

The previous prime is 2990998811. The next prime is 2990998837. The reversal of 2990998817 is 7188990992.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2311301776 + 679697041 = 48076^2 + 26071^2 .

It is a cyclic number.

It is not a de Polignac number, because 2990998817 - 2¹⁸ = 2990736673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2990998817.

It is not an unprimeable number, because it can be changed into a prime (2990998811) 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, 1446692 + ... + 1448757.

It is an arithmetic number, because the mean of its divisors is an integer number (748473825).

Almost surely, 2^2990998817 is an apocalyptic number.

It is an amenable number.

2990998817 is a deficient number, since it is larger than the sum of its proper divisors (2896483).

2990998817 is a wasteful number, since it uses less digits than its factorization.

2990998817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896482.

The product of its (nonzero) digits is 5878656, while the sum is 62.

The square root of 2990998817 is about 54690.0248400017. The cubic root of 2990998817 is about 1440.8056861231.

The spelling of 2990998817 in words is "two billion, nine hundred ninety million, nine hundred ninety-eight thousand, eight hundred seventeen".