1690289381 has 16 divisors (see below), whose sum is σ = 1943472960. Its totient is φ = 1453898880.

The previous prime is 1690289351. The next prime is 1690289399. The reversal of 1690289381 is 1839820961.

It is a cyclic number.

It is not a de Polignac number, because 1690289381 - 2²² = 1686095077 is a prime.

It is a super-2 number, since 2×1690289381² = 5714156383042726322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690289351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174395 + ... + 183831.

It is an arithmetic number, because the mean of its divisors is an integer number (121467060).

Almost surely, 2^1690289381 is an apocalyptic number.

1690289381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1690289381 is a deficient number, since it is larger than the sum of its proper divisors (253183579).

1690289381 is a wasteful number, since it uses less digits than its factorization.

1690289381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10324.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1690289381 is about 41113.1290587326. The cubic root of 1690289381 is about 1191.2064080675.

The spelling of 1690289381 in words is "one billion, six hundred ninety million, two hundred eighty-nine thousand, three hundred eighty-one".