1161388901 has 8 divisors (see below), whose sum is σ = 1180400640. Its totient is φ = 1142461152.

The previous prime is 1161388883. The next prime is 1161388903. The reversal of 1161388901 is 1098831611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161388901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161388903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7190 + ... + 48728.

It is an arithmetic number, because the mean of its divisors is an integer number (147550080).

Almost surely, 2^1161388901 is an apocalyptic number.

It is an amenable number.

1161388901 is a deficient number, since it is larger than the sum of its proper divisors (19011739).

1161388901 is an equidigital number, since it uses as much as digits as its factorization.

1161388901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41995.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 1161388901 is about 34079.1564009440. The cubic root of 1161388901 is about 1051.1367585904.

The spelling of 1161388901 in words is "one billion, one hundred sixty-one million, three hundred eighty-eight thousand, nine hundred one".