1671749477 has 2 divisors, whose sum is σ = 1671749478. Its totient is φ = 1671749476.

The previous prime is 1671749473. The next prime is 1671749501. The reversal of 1671749477 is 7749471761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1568239201 + 103510276 = 39601^2 + 10174^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671749477 - 2² = 1671749473 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671749473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835874738 + 835874739.

It is an arithmetic number, because the mean of its divisors is an integer number (835874739).

Almost surely, 2^1671749477 is an apocalyptic number.

It is an amenable number.

1671749477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671749477 is an equidigital number, since it uses as much as digits as its factorization.

1671749477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2074464, while the sum is 53.

The square root of 1671749477 is about 40887.0331156468. The cubic root of 1671749477 is about 1186.8351459419.

The spelling of 1671749477 in words is "one billion, six hundred seventy-one million, seven hundred forty-nine thousand, four hundred seventy-seven".