85613929 has 4 divisors (see below), whose sum is σ = 85786000. Its totient is φ = 85441860.

The previous prime is 85613917. The next prime is 85613977. The reversal of 85613929 is 92931658.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92931658 = 2 ⋅46465829.

It is a cyclic number.

It is not a de Polignac number, because 85613929 - 2⁹ = 85613417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85613999) 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, 85287 + ... + 86284.

It is an arithmetic number, because the mean of its divisors is an integer number (21446500).

Almost surely, 2^85613929 is an apocalyptic number.

It is an amenable number.

85613929 is a deficient number, since it is larger than the sum of its proper divisors (172071).

85613929 is a wasteful number, since it uses less digits than its factorization.

85613929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172070.

The product of its digits is 116640, while the sum is 43.

The square root of 85613929 is about 9252.7795283363. The cubic root of 85613929 is about 440.7389940227.

The spelling of 85613929 in words is "eighty-five million, six hundred thirteen thousand, nine hundred twenty-nine".