85723451 has 4 divisors (see below), whose sum is σ = 93516504. Its totient is φ = 77930400.

The previous prime is 85723439. The next prime is 85723471. The reversal of 85723451 is 15432758.

It is a happy number.

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 85723451 - 2²⁶ = 18614587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85723471) 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, 3896510 + ... + 3896531.

It is an arithmetic number, because the mean of its divisors is an integer number (23379126).

Almost surely, 2^85723451 is an apocalyptic number.

85723451 is a deficient number, since it is larger than the sum of its proper divisors (7793053).

85723451 is a wasteful number, since it uses less digits than its factorization.

85723451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793052.

The product of its digits is 33600, while the sum is 35.

The square root of 85723451 is about 9258.6959664955. The cubic root of 85723451 is about 440.9268530460.

The spelling of 85723451 in words is "eighty-five million, seven hundred twenty-three thousand, four hundred fifty-one".