147023491 has 2 divisors, whose sum is σ = 147023492. Its totient is φ = 147023490.

The previous prime is 147023489. The next prime is 147023507. The reversal of 147023491 is 194320741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 147023491 - 2¹ = 147023489 is a prime.

Together with 147023489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (147023411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73511745 + 73511746.

It is an arithmetic number, because the mean of its divisors is an integer number (73511746).

Almost surely, 2^147023491 is an apocalyptic number.

147023491 is a deficient number, since it is larger than the sum of its proper divisors (1).

147023491 is an equidigital number, since it uses as much as digits as its factorization.

147023491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 147023491 is about 12125.3243667953. The cubic root of 147023491 is about 527.7913199587.

The spelling of 147023491 in words is "one hundred forty-seven million, twenty-three thousand, four hundred ninety-one".