147505961 has 2 divisors, whose sum is σ = 147505962. Its totient is φ = 147505960.

The previous prime is 147505951. The next prime is 147505973. The reversal of 147505961 is 169505741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146773225 + 732736 = 12115^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 147505961 - 2¹⁴ = 147489577 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (147505901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73752980 + 73752981.

It is an arithmetic number, because the mean of its divisors is an integer number (73752981).

Almost surely, 2^147505961 is an apocalyptic number.

147505961 is the 5432-nd centered decagonal number.

It is an amenable number.

147505961 is a deficient number, since it is larger than the sum of its proper divisors (1).

147505961 is an equidigital number, since it uses as much as digits as its factorization.

147505961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 147505961 is about 12145.2032094980. The cubic root of 147505961 is about 528.3680201817.

The spelling of 147505961 in words is "one hundred forty-seven million, five hundred five thousand, nine hundred sixty-one".