147517661 has 2 divisors, whose sum is σ = 147517662. Its totient is φ = 147517660.

The previous prime is 147517633. The next prime is 147517679. The reversal of 147517661 is 166715741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132112036 + 15405625 = 11494^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 147517661 - 2¹⁸ = 147255517 is a prime.

It is a super-2 number, since 2×147517661² = 43522920613821842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147517621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73758830 + 73758831.

It is an arithmetic number, because the mean of its divisors is an integer number (73758831).

Almost surely, 2^147517661 is an apocalyptic number.

It is an amenable number.

147517661 is a deficient number, since it is larger than the sum of its proper divisors (1).

147517661 is an equidigital number, since it uses as much as digits as its factorization.

147517661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 38.

The square root of 147517661 is about 12145.6848715912. The cubic root of 147517661 is about 528.3819896565.

The spelling of 147517661 in words is "one hundred forty-seven million, five hundred seventeen thousand, six hundred sixty-one".