161623847 has 16 divisors (see below), whose sum is σ = 202244352. Its totient is φ = 125478720.

The previous prime is 161623817. The next prime is 161623853. The reversal of 161623847 is 748326161.

161623847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161623847 - 2⁸ = 161623591 is a prime.

It is a super-2 number, since 2×161623847² = 52244535838158818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161623847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161623817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18083 + ... + 25499.

It is an arithmetic number, because the mean of its divisors is an integer number (12640272).

Almost surely, 2^161623847 is an apocalyptic number.

161623847 is a deficient number, since it is larger than the sum of its proper divisors (40620505).

161623847 is a wasteful number, since it uses less digits than its factorization.

161623847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718.

The product of its digits is 48384, while the sum is 38.

The square root of 161623847 is about 12713.1367883776. The cubic root of 161623847 is about 544.7139278057.

The spelling of 161623847 in words is "one hundred sixty-one million, six hundred twenty-three thousand, eight hundred forty-seven".