2142978727 has 4 divisors (see below), whose sum is σ = 2170105120. Its totient is φ = 2115852336.

The previous prime is 2142978713. The next prime is 2142978749. The reversal of 2142978727 is 7278792412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142978727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142978787) 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, 13563078 + ... + 13563235.

It is an arithmetic number, because the mean of its divisors is an integer number (542526280).

Almost surely, 2^2142978727 is an apocalyptic number.

2142978727 is a deficient number, since it is larger than the sum of its proper divisors (27126393).

2142978727 is an equidigital number, since it uses as much as digits as its factorization.

2142978727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27126392.

The product of its digits is 790272, while the sum is 49.

The square root of 2142978727 is about 46292.3182288379. The cubic root of 2142978727 is about 1289.2563722874.

The spelling of 2142978727 in words is "two billion, one hundred forty-two million, nine hundred seventy-eight thousand, seven hundred twenty-seven".