1165662623 has 4 divisors (see below), whose sum is σ = 1166242560. Its totient is φ = 1165082688.

The previous prime is 1165662607. The next prime is 1165662643. The reversal of 1165662623 is 3262665611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3262665611 = 113 ⋅28873147.

It is a cyclic number.

It is not a de Polignac number, because 1165662623 - 2⁴ = 1165662607 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 (1165662643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286943 + ... + 290976.

It is an arithmetic number, because the mean of its divisors is an integer number (291560640).

Almost surely, 2^1165662623 is an apocalyptic number.

1165662623 is a deficient number, since it is larger than the sum of its proper divisors (579937).

1165662623 is an equidigital number, since it uses as much as digits as its factorization.

1165662623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579936.

The product of its digits is 77760, while the sum is 38.

The square root of 1165662623 is about 34141.8016952826. The cubic root of 1165662623 is about 1052.4245176561.

The spelling of 1165662623 in words is "one billion, one hundred sixty-five million, six hundred sixty-two thousand, six hundred twenty-three".