147390931 has 2 divisors, whose sum is σ = 147390932. Its totient is φ = 147390930.

The previous prime is 147390917. The next prime is 147390953. The reversal of 147390931 is 139093741.

It is a weak prime.

It is an emirp because it is prime and its reverse (139093741) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147390931 is a prime.

It is a super-2 number, since 2×147390931² = 43448173082093522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (147391931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73695465 + 73695466.

It is an arithmetic number, because the mean of its divisors is an integer number (73695466).

Almost surely, 2^147390931 is an apocalyptic number.

147390931 is a deficient number, since it is larger than the sum of its proper divisors (1).

147390931 is an equidigital number, since it uses as much as digits as its factorization.

147390931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 147390931 is about 12140.4666714258. The cubic root of 147390931 is about 528.2306382103.

The spelling of 147390931 in words is "one hundred forty-seven million, three hundred ninety thousand, nine hundred thirty-one".