2114399978 has 4 divisors (see below), whose sum is σ = 3171599970. Its totient is φ = 1057199988.

The previous prime is 2114399957. The next prime is 2114399993. The reversal of 2114399978 is 8799934112.

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., 1352253529 + 762146449 = 36773^2 + 27607^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528599993 + ... + 528599996.

Almost surely, 2^2114399978 is an apocalyptic number.

2114399978 is a deficient number, since it is larger than the sum of its proper divisors (1057199992).

2114399978 is a wasteful number, since it uses less digits than its factorization.

2114399978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057199991.

The product of its digits is 979776, while the sum is 53.

The square root of 2114399978 is about 45982.6051676066. The cubic root of 2114399978 is about 1283.4995336258.

It can be divided in two parts, 21143 and 99978, that added together give a palindrome (121121).

The spelling of 2114399978 in words is "two billion, one hundred fourteen million, three hundred ninety-nine thousand, nine hundred seventy-eight".