1673804145 has 64 divisors (see below), whose sum is σ = 3073029120. Its totient is φ = 771109632.

The previous prime is 1673804141. The next prime is 1673804149. The reversal of 1673804145 is 5414083761.

It is an interprime number because it is at equal distance from previous prime (1673804141) and next prime (1673804149).

It is not a de Polignac number, because 1673804145 - 2² = 1673804141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1673804141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304794 + ... + 310236.

It is an arithmetic number, because the mean of its divisors is an integer number (48016080).

Almost surely, 2^1673804145 is an apocalyptic number.

1673804145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1673804145 is a deficient number, since it is larger than the sum of its proper divisors (1399224975).

1673804145 is a wasteful number, since it uses less digits than its factorization.

1673804145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1673804145 is about 40912.1515567197. The cubic root of 1673804145 is about 1187.3211744755.

The spelling of 1673804145 in words is "one billion, six hundred seventy-three million, eight hundred four thousand, one hundred forty-five".