1671540467 has 4 divisors (see below), whose sum is σ = 1671906816. Its totient is φ = 1671174120.

The previous prime is 1671540449. The next prime is 1671540509. The reversal of 1671540467 is 7640451761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7640451761 = 27541 ⋅277421.

It is a cyclic number.

It is not a de Polignac number, because 1671540467 - 2¹² = 1671536371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671540667) 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, 176243 + ... + 185484.

It is an arithmetic number, because the mean of its divisors is an integer number (417976704).

Almost surely, 2^1671540467 is an apocalyptic number.

1671540467 is a deficient number, since it is larger than the sum of its proper divisors (366349).

1671540467 is an equidigital number, since it uses as much as digits as its factorization.

1671540467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366348.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1671540467 is about 40884.4770909449. The cubic root of 1671540467 is about 1186.7856826389.

The spelling of 1671540467 in words is "one billion, six hundred seventy-one million, five hundred forty thousand, four hundred sixty-seven".