1189017950 has 12 divisors (see below), whose sum is σ = 2211573480. Its totient is φ = 475607160.

The previous prime is 1189017923. The next prime is 1189017997. The reversal of 1189017950 is 597109811.

It is a junction number, because it is equal to n+sod(n) for n = 1189017898 and 1189017907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11890130 + ... + 11890229.

It is an arithmetic number, because the mean of its divisors is an integer number (184297790).

Almost surely, 2^1189017950 is an apocalyptic number.

1189017950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1189017950 is a deficient number, since it is larger than the sum of its proper divisors (1022555530).

1189017950 is a wasteful number, since it uses less digits than its factorization.

1189017950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23780371 (or 23780366 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 41.

The square root of 1189017950 is about 34482.1395797883. The cubic root of 1189017950 is about 1059.4069157610.

The spelling of 1189017950 in words is "one billion, one hundred eighty-nine million, seventeen thousand, nine hundred fifty".