49981787 has 2 divisors, whose sum is σ = 49981788. Its totient is φ = 49981786.

The previous prime is 49981699. The next prime is 49981801. The reversal of 49981787 is 78718994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49981787 is a prime.

It is not a weakly prime, because it can be changed into another prime (49921787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24990893 + 24990894.

It is an arithmetic number, because the mean of its divisors is an integer number (24990894).

Almost surely, 2^49981787 is an apocalyptic number.

49981787 is a deficient number, since it is larger than the sum of its proper divisors (1).

49981787 is an equidigital number, since it uses as much as digits as its factorization.

49981787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 53.

The square root of 49981787 is about 7069.7798409851. The cubic root of 49981787 is about 368.3584129212.

The spelling of 49981787 in words is "forty-nine million, nine hundred eighty-one thousand, seven hundred eighty-seven".