181413461 has 2 divisors, whose sum is σ = 181413462. Its totient is φ = 181413460.

The previous prime is 181413439. The next prime is 181413469. The reversal of 181413461 is 164314181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139098436 + 42315025 = 11794^2 + 6505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181413461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181413469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90706730 + 90706731.

It is an arithmetic number, because the mean of its divisors is an integer number (90706731).

Almost surely, 2^181413461 is an apocalyptic number.

It is an amenable number.

181413461 is a deficient number, since it is larger than the sum of its proper divisors (1).

181413461 is an equidigital number, since it uses as much as digits as its factorization.

181413461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 181413461 is about 13468.9814388468. The cubic root of 181413461 is about 566.0956742461.

The spelling of 181413461 in words is "one hundred eighty-one million, four hundred thirteen thousand, four hundred sixty-one".