161315629 has 4 divisors (see below), whose sum is σ = 168329376. Its totient is φ = 154301884.

The previous prime is 161315593. The next prime is 161315633. The reversal of 161315629 is 926513161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161315629 - 2⁹ = 161315117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161315594 and 161315603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161315639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3506839 + ... + 3506884.

It is an arithmetic number, because the mean of its divisors is an integer number (42082344).

Almost surely, 2^161315629 is an apocalyptic number.

It is an amenable number.

161315629 is a deficient number, since it is larger than the sum of its proper divisors (7013747).

161315629 is an equidigital number, since it uses as much as digits as its factorization.

161315629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7013746.

The product of its digits is 9720, while the sum is 34.

The square root of 161315629 is about 12701.0089756680. The cubic root of 161315629 is about 544.3674494926.

It can be divided in two parts, 161315 and 629, that multiplied together give a triangular number (101467135 = T₁₄₂₄₅).

The spelling of 161315629 in words is "one hundred sixty-one million, three hundred fifteen thousand, six hundred twenty-nine".