1672655609 has 2 divisors, whose sum is σ = 1672655610. Its totient is φ = 1672655608.

The previous prime is 1672655597. The next prime is 1672655689. The reversal of 1672655609 is 9065562761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1626347584 + 46308025 = 40328^2 + 6805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672655609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1672655689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836327804 + 836327805.

It is an arithmetic number, because the mean of its divisors is an integer number (836327805).

Almost surely, 2^1672655609 is an apocalyptic number.

It is an amenable number.

1672655609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672655609 is an equidigital number, since it uses as much as digits as its factorization.

1672655609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 1672655609 is about 40898.1125359105. The cubic root of 1672655609 is about 1187.0495391218.

The spelling of 1672655609 in words is "one billion, six hundred seventy-two million, six hundred fifty-five thousand, six hundred nine".