1690044371 has 4 divisors (see below), whose sum is σ = 1690536144. Its totient is φ = 1689552600.

The previous prime is 1690044361. The next prime is 1690044401. The reversal of 1690044371 is 1734400961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1734400961 = 15187 ⋅114203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690044371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690044361) 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, 240695 + ... + 247616.

It is an arithmetic number, because the mean of its divisors is an integer number (422634036).

Almost surely, 2^1690044371 is an apocalyptic number.

1690044371 is a deficient number, since it is larger than the sum of its proper divisors (491773).

1690044371 is an equidigital number, since it uses as much as digits as its factorization.

1690044371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491772.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1690044371 is about 41110.1492456547. The cubic root of 1690044371 is about 1191.1488495634.

The spelling of 1690044371 in words is "one billion, six hundred ninety million, forty-four thousand, three hundred seventy-one".