1672135187 has 2 divisors, whose sum is σ = 1672135188. Its totient is φ = 1672135186.

The previous prime is 1672135151. The next prime is 1672135207. The reversal of 1672135187 is 7815312761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1672135187 - 2¹² = 1672131091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1672135687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836067593 + 836067594.

It is an arithmetic number, because the mean of its divisors is an integer number (836067594).

Almost surely, 2^1672135187 is an apocalyptic number.

1672135187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672135187 is an equidigital number, since it uses as much as digits as its factorization.

1672135187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 1672135187 is about 40891.7496201862. The cubic root of 1672135187 is about 1186.9264153952.

The spelling of 1672135187 in words is "one billion, six hundred seventy-two million, one hundred thirty-five thousand, one hundred eighty-seven".