147031921 has 8 divisors (see below), whose sum is σ = 152006624. Its totient is φ = 142128000.

The previous prime is 147031919. The next prime is 147031949. The reversal of 147031921 is 129130741.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 147031921 - 2¹ = 147031919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147031921.

It is not an unprimeable number, because it can be changed into a prime (147031961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13455 + ... + 21796.

It is an arithmetic number, because the mean of its divisors is an integer number (19000828).

Almost surely, 2^147031921 is an apocalyptic number.

It is an amenable number.

147031921 is a deficient number, since it is larger than the sum of its proper divisors (4974703).

147031921 is an equidigital number, since it uses as much as digits as its factorization.

147031921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35391.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 147031921 is about 12125.6719813790. The cubic root of 147031921 is about 527.8014072260.

The spelling of 147031921 in words is "one hundred forty-seven million, thirty-one thousand, nine hundred twenty-one".