1689401654 has 4 divisors (see below), whose sum is σ = 2534102484. Its totient is φ = 844700826.

The previous prime is 1689401629. The next prime is 1689401657. The reversal of 1689401654 is 4561049861.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689401657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422350412 + ... + 422350415.

It is an arithmetic number, because the mean of its divisors is an integer number (633525621).

Almost surely, 2^1689401654 is an apocalyptic number.

1689401654 is a deficient number, since it is larger than the sum of its proper divisors (844700830).

1689401654 is an equidigital number, since it uses as much as digits as its factorization.

1689401654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844700829.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1689401654 is about 41102.3314910480. The cubic root of 1689401654 is about 1190.9978340641.

The spelling of 1689401654 in words is "one billion, six hundred eighty-nine million, four hundred one thousand, six hundred fifty-four".