1189990916 has 6 divisors (see below), whose sum is σ = 2082484110. Its totient is φ = 594995456.

The previous prime is 1189990903. The next prime is 1189990961. The reversal of 1189990916 is 6190999811.

It can be written as a sum of positive squares in only one way, i.e., 1189974016 + 16900 = 34496^2 + 130^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148748861 + ... + 148748868.

It is an arithmetic number, because the mean of its divisors is an integer number (347080685).

Almost surely, 2^1189990916 is an apocalyptic number.

It is an amenable number.

1189990916 is a deficient number, since it is larger than the sum of its proper divisors (892493194).

1189990916 is a wasteful number, since it uses less digits than its factorization.

1189990916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297497733 (or 297497731 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 53.

The square root of 1189990916 is about 34496.2449550672. The cubic root of 1189990916 is about 1059.6958056750.

The spelling of 1189990916 in words is "one billion, one hundred eighty-nine million, nine hundred ninety thousand, nine hundred sixteen".