161390930 has 16 divisors (see below), whose sum is σ = 293381784. Its totient is φ = 63916800.

The previous prime is 161390923. The next prime is 161390941. The reversal of 161390930 is 39093161.

161390930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 120187369 + 41203561 = 10963^2 + 6419^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78887 + ... + 80906.

Almost surely, 2^161390930 is an apocalyptic number.

161390930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161390930 is a deficient number, since it is larger than the sum of its proper divisors (131990854).

161390930 is a wasteful number, since it uses less digits than its factorization.

161390930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159901.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 161390930 is about 12703.9730006010. The cubic root of 161390930 is about 544.4521386143.

The spelling of 161390930 in words is "one hundred sixty-one million, three hundred ninety thousand, nine hundred thirty".