85423429 has 16 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 67431168.

The previous prime is 85423399. The next prime is 85423433. The reversal of 85423429 is 92432458.

It is a happy number.

It is not a de Polignac number, because 85423429 - 2⁷ = 85423301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85423469) 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, 53172 + ... + 54754.

It is an arithmetic number, because the mean of its divisors is an integer number (6586272).

Almost surely, 2^85423429 is an apocalyptic number.

It is an amenable number.

85423429 is a deficient number, since it is larger than the sum of its proper divisors (19956923).

85423429 is a wasteful number, since it uses less digits than its factorization.

85423429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its digits is 69120, while the sum is 37.

The square root of 85423429 is about 9242.4795915382. The cubic root of 85423429 is about 440.4118543843.

The spelling of 85423429 in words is "eighty-five million, four hundred twenty-three thousand, four hundred twenty-nine".