1673652509 has 2 divisors, whose sum is σ = 1673652510. Its totient is φ = 1673652508.

The previous prime is 1673652481. The next prime is 1673652557. The reversal of 1673652509 is 9052563761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1402128025 + 271524484 = 37445^2 + 16478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673652509 - 2²⁸ = 1405217053 is a prime.

It is a super-2 number, since 2×1673652509² = 5602225441763990162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1673652509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673654509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836826254 + 836826255.

It is an arithmetic number, because the mean of its divisors is an integer number (836826255).

Almost surely, 2^1673652509 is an apocalyptic number.

It is an amenable number.

1673652509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673652509 is an equidigital number, since it uses as much as digits as its factorization.

1673652509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 1673652509 is about 40910.2983245050. The cubic root of 1673652509 is about 1187.2853188128.

The spelling of 1673652509 in words is "one billion, six hundred seventy-three million, six hundred fifty-two thousand, five hundred nine".