63440987 has 2 divisors, whose sum is σ = 63440988. Its totient is φ = 63440986.

The previous prime is 63440983. The next prime is 63441011. The reversal of 63440987 is 78904436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63440987 - 2² = 63440983 is a prime.

It is not a weakly prime, because it can be changed into another prime (63440983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720493 + 31720494.

It is an arithmetic number, because the mean of its divisors is an integer number (31720494).

Almost surely, 2^63440987 is an apocalyptic number.

63440987 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440987 is an equidigital number, since it uses as much as digits as its factorization.

63440987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 63440987 is about 7964.9850596219. The cubic root of 63440987 is about 398.8319822394.

The spelling of 63440987 in words is "sixty-three million, four hundred forty thousand, nine hundred eighty-seven".