11991370 has 8 divisors (see below), whose sum is σ = 21584484. Its totient is φ = 4796544.

The previous prime is 11991313. The next prime is 11991373. The reversal of 11991370 is 7319911.

It can be written as a sum of positive squares in 2 ways, for example, as 11881809 + 109561 = 3447^2 + 331^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11991373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599559 + ... + 599578.

Almost surely, 2^11991370 is an apocalyptic number.

11991370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11991370 is a deficient number, since it is larger than the sum of its proper divisors (9593114).

11991370 is a wasteful number, since it uses less digits than its factorization.

11991370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199144.

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

The square root of 11991370 is about 3462.8557578969. The cubic root of 11991370 is about 228.8879526604.

The spelling of 11991370 in words is "eleven million, nine hundred ninety-one thousand, three hundred seventy".