1201616659 has 4 divisors (see below), whose sum is σ = 1219551304. Its totient is φ = 1183682016.

The previous prime is 1201616621. The next prime is 1201616681. The reversal of 1201616659 is 9566161021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201616659 - 2¹⁵ = 1201583891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201611659) 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, 8967222 + ... + 8967355.

It is an arithmetic number, because the mean of its divisors is an integer number (304887826).

Almost surely, 2^1201616659 is an apocalyptic number.

1201616659 is a deficient number, since it is larger than the sum of its proper divisors (17934645).

1201616659 is an equidigital number, since it uses as much as digits as its factorization.

1201616659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17934644.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1201616659 is about 34664.3427602486. The cubic root of 1201616659 is about 1063.1355651911.

The spelling of 1201616659 in words is "one billion, two hundred one million, six hundred sixteen thousand, six hundred fifty-nine".