1165403953 has 8 divisors (see below), whose sum is σ = 1345078080. Its totient is φ = 989026800.

The previous prime is 1165403929. The next prime is 1165403999. The reversal of 1165403953 is 3593045611.

It is a happy number.

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 1165403953 - 2¹⁷ = 1165272881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165403153) 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, 823483 + ... + 824896.

It is an arithmetic number, because the mean of its divisors is an integer number (168134760).

Almost surely, 2^1165403953 is an apocalyptic number.

It is an amenable number.

1165403953 is a deficient number, since it is larger than the sum of its proper divisors (179674127).

1165403953 is a wasteful number, since it uses less digits than its factorization.

1165403953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648487.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 1165403953 is about 34138.0133136069. The cubic root of 1165403953 is about 1052.3466647154.

The spelling of 1165403953 in words is "one billion, one hundred sixty-five million, four hundred three thousand, nine hundred fifty-three".