49312987 has 2 divisors, whose sum is σ = 49312988. Its totient is φ = 49312986.

The previous prime is 49312981. The next prime is 49312997. The reversal of 49312987 is 78921394.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49312987 - 2⁷ = 49312859 is a prime.

It is not a weakly prime, because it can be changed into another prime (49312981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24656493 + 24656494.

It is an arithmetic number, because the mean of its divisors is an integer number (24656494).

Almost surely, 2^49312987 is an apocalyptic number.

49312987 is a deficient number, since it is larger than the sum of its proper divisors (1).

49312987 is an equidigital number, since it uses as much as digits as its factorization.

49312987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 49312987 is about 7022.3206278267. The cubic root of 49312987 is about 366.7080439072.

The spelling of 49312987 in words is "forty-nine million, three hundred twelve thousand, nine hundred eighty-seven".