1194967981 has 8 divisors (see below), whose sum is σ = 1223937440. Its totient is φ = 1166326128.

The previous prime is 1194967951. The next prime is 1194968003. The reversal of 1194967981 is 1897694911.

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

It is a cyclic number.

It is not a de Polignac number, because 1194967981 - 2¹³ = 1194959789 is a prime.

It is a super-2 number, since 2×1194967981² = 2855896951230432722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1194967901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74511 + ... + 89116.

It is an arithmetic number, because the mean of its divisors is an integer number (152992180).

Almost surely, 2^1194967981 is an apocalyptic number.

It is an amenable number.

1194967981 is a deficient number, since it is larger than the sum of its proper divisors (28969459).

1194967981 is a wasteful number, since it uses less digits than its factorization.

1194967981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163803.

The product of its digits is 979776, while the sum is 55.

The square root of 1194967981 is about 34568.3089114871. The cubic root of 1194967981 is about 1061.1711219707.

The spelling of 1194967981 in words is "one billion, one hundred ninety-four million, nine hundred sixty-seven thousand, nine hundred eighty-one".