85603961 has 4 divisors (see below), whose sum is σ = 86776692. Its totient is φ = 84431232.

The previous prime is 85603939. The next prime is 85603963. The reversal of 85603961 is 16930658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16930658 = 2 ⋅8465329.

It can be written as a sum of positive squares in 2 ways, for example, as 71503936 + 14100025 = 8456^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 85603961 - 2⁶ = 85603897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85603963) 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, 586256 + ... + 586401.

It is an arithmetic number, because the mean of its divisors is an integer number (21694173).

Almost surely, 2^85603961 is an apocalyptic number.

It is an amenable number.

85603961 is a deficient number, since it is larger than the sum of its proper divisors (1172731).

85603961 is a wasteful number, since it uses less digits than its factorization.

85603961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172730.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 85603961 is about 9252.2408637043. The cubic root of 85603961 is about 440.7218883295.

It can be divided in two parts, 8560 and 3961, that added together give a palindrome (12521).

The spelling of 85603961 in words is "eighty-five million, six hundred three thousand, nine hundred sixty-one".