1206165623 has 16 divisors (see below), whose sum is σ = 1376577216. Its totient is φ = 1046960640.

The previous prime is 1206165617. The next prime is 1206165629. The reversal of 1206165623 is 3265616021.

It is an interprime number because it is at equal distance from previous prime (1206165617) and next prime (1206165629).

It is not a de Polignac number, because 1206165623 - 2¹² = 1206161527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206165623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206165629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392513 + ... + 395573.

It is an arithmetic number, because the mean of its divisors is an integer number (86036076).

Almost surely, 2^1206165623 is an apocalyptic number.

1206165623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1206165623 is a deficient number, since it is larger than the sum of its proper divisors (170411593).

1206165623 is a wasteful number, since it uses less digits than its factorization.

1206165623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1206165623 is about 34729.8952345094. The cubic root of 1206165623 is about 1064.4754477062.

The spelling of 1206165623 in words is "one billion, two hundred six million, one hundred sixty-five thousand, six hundred twenty-three".