1689055207 has 8 divisors (see below), whose sum is σ = 1996912800. Its totient is φ = 1397838624.

The previous prime is 1689055153. The next prime is 1689055231. The reversal of 1689055207 is 7025509861.

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

It is a de Polignac number, because none of the positive numbers 2^k-1689055207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689055267) 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, 4160032 + ... + 4160437.

It is an arithmetic number, because the mean of its divisors is an integer number (249614100).

Almost surely, 2^1689055207 is an apocalyptic number.

1689055207 is a deficient number, since it is larger than the sum of its proper divisors (307857593).

1689055207 is an equidigital number, since it uses as much as digits as its factorization.

1689055207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320505.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 1689055207 is about 41098.1168303366. The cubic root of 1689055207 is about 1190.9164155267.

The spelling of 1689055207 in words is "one billion, six hundred eighty-nine million, fifty-five thousand, two hundred seven".