73771945 has 16 divisors (see below), whose sum is σ = 95956560. Its totient is φ = 54123264.

The previous prime is 73771939. The next prime is 73771981. The reversal of 73771945 is 54917737.

It can be written as a sum of positive squares in 8 ways, for example, as 1024 + 73770921 = 32^2 + 8589^2 .

It is not a de Polignac number, because 73771945 - 2¹⁷ = 73640873 is a prime.

It is a super-4 number, since 4×73771945⁴ (a number of 33 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6591 + ... + 13819.

It is an arithmetic number, because the mean of its divisors is an integer number (5997285).

Almost surely, 2^73771945 is an apocalyptic number.

It is an amenable number.

73771945 is a deficient number, since it is larger than the sum of its proper divisors (22184615).

73771945 is a wasteful number, since it uses less digits than its factorization.

73771945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404.

The product of its digits is 185220, while the sum is 43.

The square root of 73771945 is about 8589.0596109237. The cubic root of 73771945 is about 419.4019170595.

The spelling of 73771945 in words is "seventy-three million, seven hundred seventy-one thousand, nine hundred forty-five".