2147780379 has 4 divisors (see below), whose sum is σ = 2863707176. Its totient is φ = 1431853584.

The previous prime is 2147780359. The next prime is 2147780381. The reversal of 2147780379 is 9730877412.

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

It is not a de Polignac number, because 2147780379 - 2²¹ = 2145683227 is a prime.

It is a super-2 number, since 2×2147780379² = 9225921112834767282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2147780359) 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, 357963394 + ... + 357963399.

It is an arithmetic number, because the mean of its divisors is an integer number (715926794).

Almost surely, 2^2147780379 is an apocalyptic number.

2147780379 is a deficient number, since it is larger than the sum of its proper divisors (715926797).

2147780379 is an equidigital number, since it uses as much as digits as its factorization.

2147780379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715926796.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 2147780379 is about 46344.1515080382. The cubic root of 2147780379 is about 1290.2185754260.

The spelling of 2147780379 in words is "two billion, one hundred forty-seven million, seven hundred eighty thousand, three hundred seventy-nine".