161145727 has 2 divisors, whose sum is σ = 161145728. Its totient is φ = 161145726.

The previous prime is 161145689. The next prime is 161145739. The reversal of 161145727 is 727541161.

It is a strong prime.

It is an emirp because it is prime and its reverse (727541161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161145727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161145692 and 161145701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161145827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80572863 + 80572864.

It is an arithmetic number, because the mean of its divisors is an integer number (80572864).

Almost surely, 2^161145727 is an apocalyptic number.

161145727 is a deficient number, since it is larger than the sum of its proper divisors (1).

161145727 is an equidigital number, since it uses as much as digits as its factorization.

161145727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 161145727 is about 12694.3186898707. The cubic root of 161145727 is about 544.1762681656.

Adding to 161145727 its reverse (727541161), we get a palindrome (888686888).

The spelling of 161145727 in words is "one hundred sixty-one million, one hundred forty-five thousand, seven hundred twenty-seven".