1690740705 has 16 divisors (see below), whose sum is σ = 2730469824. Its totient is φ = 893300160.

The previous prime is 1690740677. The next prime is 1690740773. The reversal of 1690740705 is 5070470961.

It is not a de Polignac number, because 1690740705 - 2⁵ = 1690740673 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, 525106 + ... + 528315.

It is an arithmetic number, because the mean of its divisors is an integer number (170654364).

Almost surely, 2^1690740705 is an apocalyptic number.

1690740705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1690740705 is a deficient number, since it is larger than the sum of its proper divisors (1039729119).

1690740705 is a wasteful number, since it uses less digits than its factorization.

1690740705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053536.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 1690740705 is about 41118.6174986465. The cubic root of 1690740705 is about 1191.3124199343.

The spelling of 1690740705 in words is "one billion, six hundred ninety million, seven hundred forty thousand, seven hundred five".