690500005 has 16 divisors (see below), whose sum is σ = 923111280. Its totient is φ = 492323328.

The previous prime is 690499969. The next prime is 690500009. The reversal of 690500005 is 500005096.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1909924 + 688590081 = 1382^2 + 26241^2 .

It is a cyclic number.

It is not a de Polignac number, because 690500005 - 2¹¹ = 690497957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690500009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181272 + ... + 185041.

It is an arithmetic number, because the mean of its divisors is an integer number (57694455).

Almost surely, 2^690500005 is an apocalyptic number.

690500005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

690500005 is a deficient number, since it is larger than the sum of its proper divisors (232611275).

690500005 is a wasteful number, since it uses less digits than its factorization.

690500005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366360.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 690500005 is about 26277.3667820807. The cubic root of 690500005 is about 883.8689862179.

The spelling of 690500005 in words is "six hundred ninety million, five hundred thousand, five".