2051377987 has 2 divisors, whose sum is σ = 2051377988. Its totient is φ = 2051377986.

The previous prime is 2051377963. The next prime is 2051378033. The reversal of 2051377987 is 7897731502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051377987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2051377987.

It is not a weakly prime, because it can be changed into another prime (2051377387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025688993 + 1025688994.

It is an arithmetic number, because the mean of its divisors is an integer number (1025688994).

Almost surely, 2^2051377987 is an apocalyptic number.

2051377987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051377987 is an equidigital number, since it uses as much as digits as its factorization.

2051377987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 2051377987 is about 45292.1404550503. The cubic root of 2051377987 is about 1270.6186637951.

The spelling of 2051377987 in words is "two billion, fifty-one million, three hundred seventy-seven thousand, nine hundred eighty-seven".