1993051877 has 2 divisors, whose sum is σ = 1993051878. Its totient is φ = 1993051876.

The previous prime is 1993051847. The next prime is 1993051889. The reversal of 1993051877 is 7781503991.

1993051877 = 25774² + 25775² + 25776².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420837636 + 572214241 = 37694^2 + 23921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993051877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993051817) 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, 996525938 + 996525939.

It is an arithmetic number, because the mean of its divisors is an integer number (996525939).

Almost surely, 2^1993051877 is an apocalyptic number.

It is an amenable number.

1993051877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993051877 is an equidigital number, since it uses as much as digits as its factorization.

1993051877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 50.

The square root of 1993051877 is about 44643.6095874874. The cubic root of 1993051877 is about 1258.4603426536.

The spelling of 1993051877 in words is "one billion, nine hundred ninety-three million, fifty-one thousand, eight hundred seventy-seven".