11691970 has 16 divisors (see below), whose sum is σ = 21559608. Its totient is φ = 4562560.

The previous prime is 11691949. The next prime is 11691983. The reversal of 11691970 is 7919611.

11691970 is digitally balanced in base 2, 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 8625969 + 3066001 = 2937^2 + 1751^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13849 + ... + 14668.

Almost surely, 2^11691970 is an apocalyptic number.

11691970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11691970 is a deficient number, since it is larger than the sum of its proper divisors (9867638).

11691970 is a wasteful number, since it uses less digits than its factorization.

11691970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 11691970 is about 3419.3522778444. The cubic root of 11691970 is about 226.9669199533.

The spelling of 11691970 in words is "eleven million, six hundred ninety-one thousand, nine hundred seventy".