1601713961 has 4 divisors (see below), whose sum is σ = 1606831572. Its totient is φ = 1596596352.

The previous prime is 1601713943. The next prime is 1601713969. The reversal of 1601713961 is 1693171061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1693171061 = 29 ⋅58385209.

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 1588500736 = 3635^2 + 39856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601713961 - 2²² = 1597519657 is a prime.

It is a super-2 number, since 2×1601713961² = 5130975225724619042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601713969) 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, 2558336 + ... + 2558961.

It is an arithmetic number, because the mean of its divisors is an integer number (401707893).

Almost surely, 2^1601713961 is an apocalyptic number.

It is an amenable number.

1601713961 is a deficient number, since it is larger than the sum of its proper divisors (5117611).

1601713961 is an equidigital number, since it uses as much as digits as its factorization.

1601713961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117610.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1601713961 is about 40021.4187779494. The cubic root of 1601713961 is about 1170.0245839430.

The spelling of 1601713961 in words is "one billion, six hundred one million, seven hundred thirteen thousand, nine hundred sixty-one".