72046757 has 4 divisors (see below), whose sum is σ = 72073356. Its totient is φ = 72020160.

The previous prime is 72046747. The next prime is 72046771. The reversal of 72046757 is 75764027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75764027 = 223 ⋅339749.

It can be written as a sum of positive squares in 2 ways, for example, as 49758916 + 22287841 = 7054^2 + 4721^2 .

It is a cyclic number.

It is not a de Polignac number, because 72046757 - 2¹⁴ = 72030373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72046757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72046747) 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, 8708 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (18018339).

Almost surely, 2^72046757 is an apocalyptic number.

It is an amenable number.

72046757 is a deficient number, since it is larger than the sum of its proper divisors (26599).

72046757 is a wasteful number, since it uses less digits than its factorization.

72046757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26598.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 72046757 is about 8488.0361097253. The cubic root of 72046757 is about 416.1067992711.

The spelling of 72046757 in words is "seventy-two million, forty-six thousand, seven hundred fifty-seven".