147666731 has 2 divisors, whose sum is σ = 147666732. Its totient is φ = 147666730.

The previous prime is 147666719. The next prime is 147666781. The reversal of 147666731 is 137666741.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147666731 is a prime.

It is a super-2 number, since 2×147666731² = 43610926888452722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147666781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73833365 + 73833366.

It is an arithmetic number, because the mean of its divisors is an integer number (73833366).

Almost surely, 2^147666731 is an apocalyptic number.

147666731 is a deficient number, since it is larger than the sum of its proper divisors (1).

147666731 is an equidigital number, since it uses as much as digits as its factorization.

147666731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 147666731 is about 12151.8200694382. The cubic root of 147666731 is about 528.5599104694.

The spelling of 147666731 in words is "one hundred forty-seven million, six hundred sixty-six thousand, seven hundred thirty-one".