1191690484 has 6 divisors (see below), whose sum is σ = 2085458354. Its totient is φ = 595845240.

The previous prime is 1191690481. The next prime is 1191690529. The reversal of 1191690484 is 4840961911.

It can be written as a sum of positive squares in only one way, i.e., 1160083600 + 31606884 = 34060^2 + 5622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1191690484.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191690481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148961307 + ... + 148961314.

Almost surely, 2^1191690484 is an apocalyptic number.

It is an amenable number.

1191690484 is a deficient number, since it is larger than the sum of its proper divisors (893767870).

1191690484 is a wasteful number, since it uses less digits than its factorization.

1191690484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297922625 (or 297922623 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1191690484 is about 34520.8702671297. The cubic root of 1191690484 is about 1060.2000583594.

It can be divided in two parts, 11916 and 90484, that added together give a square (102400 = 320²).

The spelling of 1191690484 in words is "one billion, one hundred ninety-one million, six hundred ninety thousand, four hundred eighty-four".