1690382949 has 4 divisors (see below), whose sum is σ = 2253843936. Its totient is φ = 1126921964.

The previous prime is 1690382921. The next prime is 1690382957. The reversal of 1690382949 is 9492830961.

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.

It is a cyclic number.

It is not a de Polignac number, because 1690382949 - 2⁸ = 1690382693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690382909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281730489 + ... + 281730494.

It is an arithmetic number, because the mean of its divisors is an integer number (563460984).

Almost surely, 2^1690382949 is an apocalyptic number.

It is an amenable number.

1690382949 is a deficient number, since it is larger than the sum of its proper divisors (563460987).

1690382949 is an equidigital number, since it uses as much as digits as its factorization.

1690382949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563460986.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 1690382949 is about 41114.2669763186. The cubic root of 1690382949 is about 1191.2283878827.

The spelling of 1690382949 in words is "one billion, six hundred ninety million, three hundred eighty-two thousand, nine hundred forty-nine".