161434649 has 2 divisors, whose sum is σ = 161434650. Its totient is φ = 161434648.

The previous prime is 161434643. The next prime is 161434667. The reversal of 161434649 is 946434161.

161434649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115777600 + 45657049 = 10760^2 + 6757^2 .

It is a cyclic number.

It is not a de Polignac number, because 161434649 - 2⁴ = 161434633 is a prime.

It is a super-2 number, since 2×161434649² = 52122291795506402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161434643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80717324 + 80717325.

It is an arithmetic number, because the mean of its divisors is an integer number (80717325).

Almost surely, 2^161434649 is an apocalyptic number.

It is an amenable number.

161434649 is a deficient number, since it is larger than the sum of its proper divisors (1).

161434649 is an equidigital number, since it uses as much as digits as its factorization.

161434649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 161434649 is about 12705.6935662718. The cubic root of 161434649 is about 544.5012961766.

It can be divided in two parts, 1614 and 34649, that added together give a palindrome (36263).

The spelling of 161434649 in words is "one hundred sixty-one million, four hundred thirty-four thousand, six hundred forty-nine".