720690005 has 32 divisors (see below), whose sum is σ = 1016789760. Its totient is φ = 480084480.

The previous prime is 720689999. The next prime is 720690017. The reversal of 720690005 is 500096027.

It is not a de Polignac number, because 720690005 - 2¹² = 720685909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720690005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385082 + ... + 386948.

It is an arithmetic number, because the mean of its divisors is an integer number (31774680).

Almost surely, 2^720690005 is an apocalyptic number.

It is an amenable number.

720690005 is a deficient number, since it is larger than the sum of its proper divisors (296099755).

720690005 is a wasteful number, since it uses less digits than its factorization.

720690005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 720690005 is about 26845.6701350516. The cubic root of 720690005 is about 896.5671719426.

The spelling of 720690005 in words is "seven hundred twenty million, six hundred ninety thousand, five".