1671745949 has 8 divisors (see below), whose sum is σ = 1771175808. Its totient is φ = 1572437440.

The previous prime is 1671745937. The next prime is 1671745963. The reversal of 1671745949 is 9495471761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1671745949 - 2⁸ = 1671745693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1671745949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671745969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157 + ... + 57834.

It is an arithmetic number, because the mean of its divisors is an integer number (221396976).

Almost surely, 2^1671745949 is an apocalyptic number.

It is an amenable number.

1671745949 is a deficient number, since it is larger than the sum of its proper divisors (99429859).

1671745949 is a wasteful number, since it uses less digits than its factorization.

1671745949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60675.

The product of its digits is 1905120, while the sum is 53.

The square root of 1671745949 is about 40886.9899723616. The cubic root of 1671745949 is about 1186.8343110565.

The spelling of 1671745949 in words is "one billion, six hundred seventy-one million, seven hundred forty-five thousand, nine hundred forty-nine".