1188979955 has 8 divisors (see below), whose sum is σ = 1427303904. Its totient is φ = 950832000.

The previous prime is 1188979943. The next prime is 1188979999. The reversal of 1188979955 is 5599798811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1188979955 - 2¹⁸ = 1188717811 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28646 + ... + 56555.

It is an arithmetic number, because the mean of its divisors is an integer number (178412988).

Almost surely, 2^1188979955 is an apocalyptic number.

1188979955 is a deficient number, since it is larger than the sum of its proper divisors (238323949).

1188979955 is an equidigital number, since it uses as much as digits as its factorization.

1188979955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87997.

The product of its digits is 8164800, while the sum is 62.

The square root of 1188979955 is about 34481.5886379964. The cubic root of 1188979955 is about 1059.3956312118.

The spelling of 1188979955 in words is "one billion, one hundred eighty-eight million, nine hundred seventy-nine thousand, nine hundred fifty-five".