1690196477 has 4 divisors (see below), whose sum is σ = 1744718976. Its totient is φ = 1635673980.

The previous prime is 1690196449. The next prime is 1690196489. The reversal of 1690196477 is 7746910961.

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 1690196477 - 2²² = 1686002173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690196437) 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, 27261203 + ... + 27261264.

It is an arithmetic number, because the mean of its divisors is an integer number (436179744).

Almost surely, 2^1690196477 is an apocalyptic number.

It is an amenable number.

1690196477 is a deficient number, since it is larger than the sum of its proper divisors (54522499).

1690196477 is an equidigital number, since it uses as much as digits as its factorization.

1690196477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54522498.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 1690196477 is about 41111.9991851527. Note that the first 3 decimals coincide. The cubic root of 1690196477 is about 1191.1845834283.

The spelling of 1690196477 in words is "one billion, six hundred ninety million, one hundred ninety-six thousand, four hundred seventy-seven".