1690005361 has 4 divisors (see below), whose sum is σ = 1843642224. Its totient is φ = 1536368500.

The previous prime is 1690005349. The next prime is 1690005391. The reversal of 1690005361 is 1635000961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1635000961 = 11 ⋅148636451.

It is a cyclic number.

It is not a de Polignac number, because 1690005361 - 2²⁹ = 1153134449 is a prime.

It is a super-2 number, since 2×1690005361² = 5712236240417480642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690005301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76818415 + ... + 76818436.

It is an arithmetic number, because the mean of its divisors is an integer number (460910556).

Almost surely, 2^1690005361 is an apocalyptic number.

1690005361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1690005361 is a deficient number, since it is larger than the sum of its proper divisors (153636863).

1690005361 is a wasteful number, since it uses less digits than its factorization.

1690005361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153636862.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1690005361 is about 41109.6747858701. The cubic root of 1690005361 is about 1191.1396847006.

The spelling of 1690005361 in words is "one billion, six hundred ninety million, five thousand, three hundred sixty-one".