2120940787 has 4 divisors (see below), whose sum is σ = 2423932336. Its totient is φ = 1817949240.

The previous prime is 2120940761. The next prime is 2120940799. The reversal of 2120940787 is 7870490212.

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 2120940787 - 2¹¹ = 2120938739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120940707) 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, 151495764 + ... + 151495777.

It is an arithmetic number, because the mean of its divisors is an integer number (605983084).

Almost surely, 2^2120940787 is an apocalyptic number.

2120940787 is a deficient number, since it is larger than the sum of its proper divisors (302991549).

2120940787 is an equidigital number, since it uses as much as digits as its factorization.

2120940787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302991548.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 2120940787 is about 46053.6728937009. The cubic root of 2120940787 is about 1284.8216555165.

The spelling of 2120940787 in words is "two billion, one hundred twenty million, nine hundred forty thousand, seven hundred eighty-seven".