690697155 has 16 divisors (see below), whose sum is σ = 1108087200. Its totient is φ = 367381248.

The previous prime is 690697141. The next prime is 690697181. The reversal of 690697155 is 551796096.

690697155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690697155 - 2¹¹ = 690695107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56130 + ... + 67319.

It is an arithmetic number, because the mean of its divisors is an integer number (69255450).

Almost surely, 2^690697155 is an apocalyptic number.

690697155 is a deficient number, since it is larger than the sum of its proper divisors (417390045).

690697155 is a wasteful number, since it uses less digits than its factorization.

690697155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123830.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 690697155 is about 26281.1178415226. The cubic root of 690697155 is about 883.9530983047.

The spelling of 690697155 in words is "six hundred ninety million, six hundred ninety-seven thousand, one hundred fifty-five".