172545983 has 8 divisors (see below), whose sum is σ = 173976960. Its totient is φ = 171119520.

The previous prime is 172545979. The next prime is 172546021. The reversal of 172545983 is 389545271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172545983 - 2² = 172545979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172545943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155033 + ... + 156141.

It is an arithmetic number, because the mean of its divisors is an integer number (21747120).

Almost surely, 2^172545983 is an apocalyptic number.

172545983 is a deficient number, since it is larger than the sum of its proper divisors (1430977).

172545983 is a wasteful number, since it uses less digits than its factorization.

172545983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257.

The product of its digits is 302400, while the sum is 44.

The square root of 172545983 is about 13135.6759628121. The cubic root of 172545983 is about 556.7175996918.

The spelling of 172545983 in words is "one hundred seventy-two million, five hundred forty-five thousand, nine hundred eighty-three".