720827407 has 4 divisors (see below), whose sum is σ = 744079936. Its totient is φ = 697574880.

The previous prime is 720827399. The next prime is 720827431. The reversal of 720827407 is 704728027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704728027 = 23 ⋅30640349.

It is a cyclic number.

It is not a de Polignac number, because 720827407 - 2³ = 720827399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720822407) 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, 11626218 + ... + 11626279.

It is an arithmetic number, because the mean of its divisors is an integer number (186019984).

Almost surely, 2^720827407 is an apocalyptic number.

720827407 is a deficient number, since it is larger than the sum of its proper divisors (23252529).

720827407 is a wasteful number, since it uses less digits than its factorization.

720827407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23252528.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 720827407 is about 26848.2291222345. The cubic root of 720827407 is about 896.6241461820.

The spelling of 720827407 in words is "seven hundred twenty million, eight hundred twenty-seven thousand, four hundred seven".