331049987 has 2 divisors, whose sum is σ = 331049988. Its totient is φ = 331049986.

The previous prime is 331049947. The next prime is 331050019. The reversal of 331049987 is 789940133.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331049987 - 2⁶ = 331049923 is a prime.

It is not a weakly prime, because it can be changed into another prime (331049947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165524993 + 165524994.

It is an arithmetic number, because the mean of its divisors is an integer number (165524994).

Almost surely, 2^331049987 is an apocalyptic number.

331049987 is a deficient number, since it is larger than the sum of its proper divisors (1).

331049987 is an equidigital number, since it uses as much as digits as its factorization.

331049987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 331049987 is about 18194.7791138007. The cubic root of 331049987 is about 691.7744616498.

The spelling of 331049987 in words is "three hundred thirty-one million, forty-nine thousand, nine hundred eighty-seven".