690345515 has 8 divisors (see below), whose sum is σ = 828555648. Its totient is φ = 552182400.

The previous prime is 690345497. The next prime is 690345517. The reversal of 690345515 is 515543096.

690345515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690345515 - 2¹² = 690341419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690345517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51779 + ... + 63731.

It is an arithmetic number, because the mean of its divisors is an integer number (103569456).

Almost surely, 2^690345515 is an apocalyptic number.

690345515 is a deficient number, since it is larger than the sum of its proper divisors (138210133).

690345515 is a wasteful number, since it uses less digits than its factorization.

690345515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23509.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 690345515 is about 26274.4270156363. The cubic root of 690345515 is about 883.8030634066.

The spelling of 690345515 in words is "six hundred ninety million, three hundred forty-five thousand, five hundred fifteen".