161487386 has 8 divisors (see below), whose sum is σ = 256480020. Its totient is φ = 75994048.

The previous prime is 161487379. The next prime is 161487419. The reversal of 161487386 is 683784161.

It can be written as a sum of positive squares in 2 ways, for example, as 155875225 + 5612161 = 12485^2 + 2369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161487386² = 52156351674225992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374781 + ... + 2374848.

Almost surely, 2^161487386 is an apocalyptic number.

161487386 is a deficient number, since it is larger than the sum of its proper divisors (94992634).

161487386 is a wasteful number, since it uses less digits than its factorization.

161487386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749648.

The product of its digits is 193536, while the sum is 44.

The square root of 161487386 is about 12707.7687262556. The cubic root of 161487386 is about 544.5605817527.

The spelling of 161487386 in words is "one hundred sixty-one million, four hundred eighty-seven thousand, three hundred eighty-six".