1671261539 has 2 divisors, whose sum is σ = 1671261540. Its totient is φ = 1671261538.

The previous prime is 1671261499. The next prime is 1671261587. The reversal of 1671261539 is 9351621761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1671261539 - 2⁸ = 1671261283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1671261496 and 1671261505.

It is not a weakly prime, because it can be changed into another prime (1671261589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835630769 + 835630770.

It is an arithmetic number, because the mean of its divisors is an integer number (835630770).

Almost surely, 2^1671261539 is an apocalyptic number.

1671261539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671261539 is an equidigital number, since it uses as much as digits as its factorization.

1671261539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 1671261539 is about 40881.0657762246. The cubic root of 1671261539 is about 1186.7196664545.

The spelling of 1671261539 in words is "one billion, six hundred seventy-one million, two hundred sixty-one thousand, five hundred thirty-nine".