1690394069 has 8 divisors (see below), whose sum is σ = 2080485120. Its totient is φ = 1337454576.

The previous prime is 1690394051. The next prime is 1690394087. The reversal of 1690394069 is 9604930961.

It is an interprime number because it is at equal distance from previous prime (1690394051) and next prime (1690394087).

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

It is a cyclic number.

It is not a de Polignac number, because 1690394069 - 2⁸ = 1690393813 is a prime.

It is a super-2 number, since 2×1690394069² = 5714864217020753522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690394089) 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, 9287789 + ... + 9287970.

It is an arithmetic number, because the mean of its divisors is an integer number (260060640).

Almost surely, 2^1690394069 is an apocalyptic number.

It is an amenable number.

1690394069 is a deficient number, since it is larger than the sum of its proper divisors (390091051).

1690394069 is a wasteful number, since it uses less digits than its factorization.

1690394069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18575779.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 1690394069 is about 41114.4022089584. The cubic root of 1690394069 is about 1191.2309999990.

The spelling of 1690394069 in words is "one billion, six hundred ninety million, three hundred ninety-four thousand, sixty-nine".