11971930 has 8 divisors (see below), whose sum is σ = 21549492. Its totient is φ = 4788768.

The previous prime is 11971913. The next prime is 11971943. The reversal of 11971930 is 3917911.

It can be written as a sum of positive squares in 2 ways, for example, as 11108889 + 863041 = 3333^2 + 929^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11971892 and 11971901.

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, 598587 + ... + 598606.

Almost surely, 2^11971930 is an apocalyptic number.

11971930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11971930 is a deficient number, since it is larger than the sum of its proper divisors (9577562).

11971930 is a wasteful number, since it uses less digits than its factorization.

11971930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197200.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 11971930 is about 3460.0476875326. The cubic root of 11971930 is about 228.7641973133.

The spelling of 11971930 in words is "eleven million, nine hundred seventy-one thousand, nine hundred thirty".