86309421 has 12 divisors (see below), whose sum is σ = 126492576. Its totient is φ = 52308520.

The previous prime is 86309411. The next prime is 86309429. The reversal of 86309421 is 12490368.

It is not a de Polignac number, because 86309421 - 2⁹ = 86308909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86309429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118521 + ... + 119246.

It is an arithmetic number, because the mean of its divisors is an integer number (10541048).

Almost surely, 2^86309421 is an apocalyptic number.

It is an amenable number.

86309421 is a deficient number, since it is larger than the sum of its proper divisors (40183155).

86309421 is a wasteful number, since it uses less digits than its factorization.

86309421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237792 (or 237781 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 86309421 is about 9290.2863787937. The cubic root of 86309421 is about 441.9292369808.

Adding to 86309421 its reverse (12490368), we get a palindrome (98799789).

The spelling of 86309421 in words is "eighty-six million, three hundred nine thousand, four hundred twenty-one".