1161917954 has 4 divisors (see below), whose sum is σ = 1742876934. Its totient is φ = 580958976.

The previous prime is 1161917947. The next prime is 1161917959. The reversal of 1161917954 is 4597191611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 674700625 + 487217329 = 25975^2 + 22073^2 .

It is a super-2 number, since 2×1161917954² = 2700106663655092232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161917959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290479487 + ... + 290479490.

Almost surely, 2^1161917954 is an apocalyptic number.

1161917954 is a deficient number, since it is larger than the sum of its proper divisors (580958980).

1161917954 is an equidigital number, since it uses as much as digits as its factorization.

1161917954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580958979.

The product of its digits is 68040, while the sum is 44.

The square root of 1161917954 is about 34086.9176371229. The cubic root of 1161917954 is about 1051.2963441333.

The spelling of 1161917954 in words is "one billion, one hundred sixty-one million, nine hundred seventeen thousand, nine hundred fifty-four".