2145003977 has 2 divisors, whose sum is σ = 2145003978. Its totient is φ = 2145003976.

The previous prime is 2145003953. The next prime is 2145003979. The reversal of 2145003977 is 7793005412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1131918736 + 1013085241 = 33644^2 + 31829^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145003977 - 2¹² = 2144999881 is a prime.

It is a super-2 number, since 2×2145003977² = 9202084122691633058, which contains 22 as substring.

Together with 2145003979, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145003977.

It is not a weakly prime, because it can be changed into another prime (2145003979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072501988 + 1072501989.

It is an arithmetic number, because the mean of its divisors is an integer number (1072501989).

Almost surely, 2^2145003977 is an apocalyptic number.

It is an amenable number.

2145003977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145003977 is an equidigital number, since it uses as much as digits as its factorization.

2145003977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 2145003977 is about 46314.1876426652. The cubic root of 2145003977 is about 1289.6623872617.

The spelling of 2145003977 in words is "two billion, one hundred forty-five million, three thousand, nine hundred seventy-seven".