690896049 has 4 divisors (see below), whose sum is σ = 921194736. Its totient is φ = 460597364.

The previous prime is 690896033. The next prime is 690896071. The reversal of 690896049 is 940698096.

690896049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 690896049 - 2⁴ = 690896033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690895992 and 690896010.

It is not an unprimeable number, because it can be changed into a prime (690896009) 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, 115149339 + ... + 115149344.

It is an arithmetic number, because the mean of its divisors is an integer number (230298684).

Almost surely, 2^690896049 is an apocalyptic number.

It is an amenable number.

690896049 is a deficient number, since it is larger than the sum of its proper divisors (230298687).

690896049 is a wasteful number, since it uses less digits than its factorization.

690896049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230298686.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 690896049 is about 26284.9015406183. The cubic root of 690896049 is about 884.0379382345.

The spelling of 690896049 in words is "six hundred ninety million, eight hundred ninety-six thousand, forty-nine".