320141987 has 4 divisors (see below), whose sum is σ = 349245816. Its totient is φ = 291038160.

The previous prime is 320141971. The next prime is 320141993. The reversal of 320141987 is 789141023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320141987 - 2⁴ = 320141971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320141947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14551898 + ... + 14551919.

It is an arithmetic number, because the mean of its divisors is an integer number (87311454).

Almost surely, 2^320141987 is an apocalyptic number.

320141987 is a deficient number, since it is larger than the sum of its proper divisors (29103829).

320141987 is a wasteful number, since it uses less digits than its factorization.

320141987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29103828.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 320141987 is about 17892.5120371624. The cubic root of 320141987 is about 684.0915280263.

The spelling of 320141987 in words is "three hundred twenty million, one hundred forty-one thousand, nine hundred eighty-seven".