71161930 has 16 divisors (see below), whose sum is σ = 146390400. Its totient is φ = 24398352.

The previous prime is 71161913. The next prime is 71161939. The reversal of 71161930 is 3916117.

It is not an unprimeable number, because it can be changed into a prime (71161939) by changing a digit.

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, 508230 + ... + 508369.

It is an arithmetic number, because the mean of its divisors is an integer number (9149400).

Almost surely, 2^71161930 is an apocalyptic number.

71161930 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71161930 is an abundant number, since it is smaller than the sum of its proper divisors (75228470).

71161930 is a wasteful number, since it uses less digits than its factorization.

71161930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016613.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 71161930 is about 8435.7530784157. The cubic root of 71161930 is about 414.3963352749.

The spelling of 71161930 in words is "seventy-one million, one hundred sixty-one thousand, nine hundred thirty".