73749945 has 32 divisors (see below), whose sum is σ = 121968000. Its totient is φ = 38029824.

The previous prime is 73749943. The next prime is 73749947. The reversal of 73749945 is 54994737.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73749943) and next prime (73749947).

It is not a de Polignac number, because 73749945 - 2¹ = 73749943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73749894 and 73749903.

It is not an unprimeable number, because it can be changed into a prime (73749943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69781 + ... + 70829.

It is an arithmetic number, because the mean of its divisors is an integer number (3811500).

Almost surely, 2^73749945 is an apocalyptic number.

It is an amenable number.

73749945 is a deficient number, since it is larger than the sum of its proper divisors (48218055).

73749945 is a wasteful number, since it uses less digits than its factorization.

73749945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its digits is 952560, while the sum is 48.

The square root of 73749945 is about 8587.7788164344. The cubic root of 73749945 is about 419.3602220786.

The spelling of 73749945 in words is "seventy-three million, seven hundred forty-nine thousand, nine hundred forty-five".