73521007 has 4 divisors (see below), whose sum is σ = 84024016. Its totient is φ = 63018000.

The previous prime is 73520989. The next prime is 73521037. The reversal of 73521007 is 70012537.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70012537 = 7 ⋅10001791.

It is a cyclic number.

It is not a de Polignac number, because 73521007 - 2⁷ = 73520879 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 (73521037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5251494 + ... + 5251507.

It is an arithmetic number, because the mean of its divisors is an integer number (21006004).

Almost surely, 2^73521007 is an apocalyptic number.

73521007 is a deficient number, since it is larger than the sum of its proper divisors (10503009).

73521007 is a wasteful number, since it uses less digits than its factorization.

73521007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10503008.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 73521007 is about 8574.4391653332. The cubic root of 73521007 is about 418.9258398073.

The spelling of 73521007 in words is "seventy-three million, five hundred twenty-one thousand, seven".