86720401 has 4 divisors (see below), whose sum is σ = 87252592. Its totient is φ = 86188212.

The previous prime is 86720393. The next prime is 86720407. The reversal of 86720401 is 10402768.

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.

It is a cyclic number.

It is not a de Polignac number, because 86720401 - 2³ = 86720393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86720401.

It is not an unprimeable number, because it can be changed into a prime (86720407) 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, 265851 + ... + 266176.

It is an arithmetic number, because the mean of its divisors is an integer number (21813148).

Almost surely, 2^86720401 is an apocalyptic number.

It is an amenable number.

86720401 is a deficient number, since it is larger than the sum of its proper divisors (532191).

86720401 is a wasteful number, since it uses less digits than its factorization.

86720401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532190.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 86720401 is about 9312.3789119644. The cubic root of 86720401 is about 442.6295721077.

The spelling of 86720401 in words is "eighty-six million, seven hundred twenty thousand, four hundred one".