73120945 has 8 divisors (see below), whose sum is σ = 88200936. Its totient is φ = 58192896.

The previous prime is 73120939. The next prime is 73120951. The reversal of 73120945 is 54902137.

It is an interprime number because it is at equal distance from previous prime (73120939) and next prime (73120951).

It can be written as a sum of positive squares in 4 ways, for example, as 2039184 + 71081761 = 1428^2 + 8431^2 .

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 73120945 - 2⁹ = 73120433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36922 + ... + 38851.

It is an arithmetic number, because the mean of its divisors is an integer number (11025117).

Almost surely, 2^73120945 is an apocalyptic number.

It is an amenable number.

73120945 is a deficient number, since it is larger than the sum of its proper divisors (15079991).

73120945 is a wasteful number, since it uses less digits than its factorization.

73120945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75971.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 73120945 is about 8551.0785869386. The cubic root of 73120945 is about 418.1646005900.

The spelling of 73120945 in words is "seventy-three million, one hundred twenty thousand, nine hundred forty-five".