49993987 has 2 divisors, whose sum is σ = 49993988. Its totient is φ = 49993986.

The previous prime is 49993969. The next prime is 49994003. The reversal of 49993987 is 78939994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49993987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49993967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24996993 + 24996994.

It is an arithmetic number, because the mean of its divisors is an integer number (24996994).

Almost surely, 2^49993987 is an apocalyptic number.

49993987 is a deficient number, since it is larger than the sum of its proper divisors (1).

49993987 is an equidigital number, since it uses as much as digits as its factorization.

49993987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 58.

The square root of 49993987 is about 7070.6426157740. The cubic root of 49993987 is about 368.3883812177.

The spelling of 49993987 in words is "forty-nine million, nine hundred ninety-three thousand, nine hundred eighty-seven".