72750053 has 4 divisors (see below), whose sum is σ = 72984288. Its totient is φ = 72515820.

The previous prime is 72750001. The next prime is 72750061. The reversal of 72750053 is 35005727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35005727 = 31 ⋅1129217.

It is a cyclic number.

It is not a de Polignac number, because 72750053 - 2¹⁴ = 72733669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72749998 and 72750025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72750653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116651 + ... + 117272.

It is an arithmetic number, because the mean of its divisors is an integer number (18246072).

Almost surely, 2^72750053 is an apocalyptic number.

It is an amenable number.

72750053 is a deficient number, since it is larger than the sum of its proper divisors (234235).

72750053 is a wasteful number, since it uses less digits than its factorization.

72750053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234234.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 72750053 is about 8529.3641615304. The cubic root of 72750053 is about 417.4563818321.

The spelling of 72750053 in words is "seventy-two million, seven hundred fifty thousand, fifty-three".