74673945 has 24 divisors (see below), whose sum is σ = 137050056. Its totient is φ = 37483008.

The previous prime is 74673941. The next prime is 74673953. The reversal of 74673945 is 54937647.

It can be written as a sum of positive squares in 4 ways, for example, as 29192409 + 45481536 = 5403^2 + 6744^2 .

It is not a de Polignac number, because 74673945 - 2² = 74673941 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 74673945.

It is not an unprimeable number, because it can be changed into a prime (74673941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48042 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (5710419).

Almost surely, 2^74673945 is an apocalyptic number.

It is an amenable number.

74673945 is a deficient number, since it is larger than the sum of its proper divisors (62376111).

74673945 is a wasteful number, since it uses less digits than its factorization.

74673945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97641 (or 97638 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 74673945 is about 8641.4087393202. The cubic root of 74673945 is about 421.1043217119.

It can be divided in two parts, 746 and 73945, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 74673945 in words is "seventy-four million, six hundred seventy-three thousand, nine hundred forty-five".