2978894099 has 4 divisors (see below), whose sum is σ = 2983969464. Its totient is φ = 2973818736.

The previous prime is 2978894089. The next prime is 2978894143. The reversal of 2978894099 is 9904988792.

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

It is a cyclic number.

It is not a de Polignac number, because 2978894099 - 2¹⁶ = 2978828563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978894029) 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, 2536802 + ... + 2537975.

It is an arithmetic number, because the mean of its divisors is an integer number (745992366).

Almost surely, 2^2978894099 is an apocalyptic number.

2978894099 is a deficient number, since it is larger than the sum of its proper divisors (5075365).

2978894099 is an equidigital number, since it uses as much as digits as its factorization.

2978894099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075364.

The product of its (nonzero) digits is 23514624, while the sum is 65.

The square root of 2978894099 is about 54579.2460464598. The cubic root of 2978894099 is about 1438.8593878892.

The spelling of 2978894099 in words is "two billion, nine hundred seventy-eight million, eight hundred ninety-four thousand, ninety-nine".