1190807945 has 4 divisors (see below), whose sum is σ = 1428969540. Its totient is φ = 952646352.

The previous prime is 1190807941. The next prime is 1190808011. The reversal of 1190807945 is 5497080911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5497080911 = 7 ⋅785297273.

It can be written as a sum of positive squares in 2 ways, for example, as 285339664 + 905468281 = 16892^2 + 30091^2 .

It is a cyclic number.

It is not a de Polignac number, because 1190807945 - 2² = 1190807941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1190807896 and 1190807905.

It is not an unprimeable number, because it can be changed into a prime (1190807941) 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, 119080790 + ... + 119080799.

It is an arithmetic number, because the mean of its divisors is an integer number (357242385).

Almost surely, 2^1190807945 is an apocalyptic number.

It is an amenable number.

1190807945 is a deficient number, since it is larger than the sum of its proper divisors (238161595).

1190807945 is an equidigital number, since it uses as much as digits as its factorization.

1190807945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238161594.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1190807945 is about 34508.0852120195. The cubic root of 1190807945 is about 1059.9382736692.

The spelling of 1190807945 in words is "one billion, one hundred ninety million, eight hundred seven thousand, nine hundred forty-five".