1690369031 has 4 divisors (see below), whose sum is σ = 1820397432. Its totient is φ = 1560340632.

The previous prime is 1690369019. The next prime is 1690369039. The reversal of 1690369031 is 1309630961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690369031 is a prime.

It is a super-2 number, since 2×1690369031² = 5714694921927757922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690369039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65014181 + ... + 65014206.

It is an arithmetic number, because the mean of its divisors is an integer number (455099358).

Almost surely, 2^1690369031 is an apocalyptic number.

1690369031 is a deficient number, since it is larger than the sum of its proper divisors (130028401).

1690369031 is a wasteful number, since it uses less digits than its factorization.

1690369031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130028400.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 1690369031 is about 41114.0977159903. The cubic root of 1690369031 is about 1191.2251184929.

Adding to 1690369031 its reverse (1309630961), we get a palindrome (2999999992).

The spelling of 1690369031 in words is "one billion, six hundred ninety million, three hundred sixty-nine thousand, thirty-one".