145889747 has 2 divisors, whose sum is σ = 145889748. Its totient is φ = 145889746.

The previous prime is 145889743. The next prime is 145889773. The reversal of 145889747 is 747988541.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (747988541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145889747 - 2² = 145889743 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145889743) 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 as a sum of consecutive naturals, namely, 72944873 + 72944874.

It is an arithmetic number, because the mean of its divisors is an integer number (72944874).

Almost surely, 2^145889747 is an apocalyptic number.

145889747 is a deficient number, since it is larger than the sum of its proper divisors (1).

145889747 is an equidigital number, since it uses as much as digits as its factorization.

145889747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 53.

The square root of 145889747 is about 12078.4828103533. The cubic root of 145889747 is about 526.4311632462.

The spelling of 145889747 in words is "one hundred forty-five million, eight hundred eighty-nine thousand, seven hundred forty-seven".