1189380957 has 4 divisors (see below), whose sum is σ = 1585841280. Its totient is φ = 792920636.

The previous prime is 1189380901. The next prime is 1189380977. The reversal of 1189380957 is 7590839811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1189380957 - 2⁶ = 1189380893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189380977) 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, 198230157 + ... + 198230162.

It is an arithmetic number, because the mean of its divisors is an integer number (396460320).

Almost surely, 2^1189380957 is an apocalyptic number.

It is an amenable number.

1189380957 is a deficient number, since it is larger than the sum of its proper divisors (396460323).

1189380957 is an equidigital number, since it uses as much as digits as its factorization.

1189380957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396460322.

The product of its (nonzero) digits is 544320, while the sum is 51.

The square root of 1189380957 is about 34487.4028740930. The cubic root of 1189380957 is about 1059.5147170481.

The spelling of 1189380957 in words is "one billion, one hundred eighty-nine million, three hundred eighty thousand, nine hundred fifty-seven".