49691987 has 2 divisors, whose sum is σ = 49691988. Its totient is φ = 49691986.

The previous prime is 49691963. The next prime is 49692007. The reversal of 49691987 is 78919694.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49691987 - 2⁶ = 49691923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49691927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24845993 + 24845994.

It is an arithmetic number, because the mean of its divisors is an integer number (24845994).

Almost surely, 2^49691987 is an apocalyptic number.

49691987 is a deficient number, since it is larger than the sum of its proper divisors (1).

49691987 is an equidigital number, since it uses as much as digits as its factorization.

49691987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 49691987 is about 7049.2543577317. The cubic root of 49691987 is about 367.6451047456.

The spelling of 49691987 in words is "forty-nine million, six hundred ninety-one thousand, nine hundred eighty-seven".