72620057 has 4 divisors (see below), whose sum is σ = 72640356. Its totient is φ = 72599760.

The previous prime is 72620003. The next prime is 72620059. The reversal of 72620057 is 75002627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75002627 = 7 ⋅10714661.

It can be written as a sum of positive squares in 2 ways, for example, as 51423241 + 21196816 = 7171^2 + 4604^2 .

It is a cyclic number.

It is not a de Polignac number, because 72620057 - 2¹⁰ = 72619033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72620059) 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, 3194 + ... + 12467.

It is an arithmetic number, because the mean of its divisors is an integer number (18160089).

Almost surely, 2^72620057 is an apocalyptic number.

It is an amenable number.

72620057 is a deficient number, since it is larger than the sum of its proper divisors (20299).

72620057 is a wasteful number, since it uses less digits than its factorization.

72620057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20298.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72620057 is about 8521.7402565438. The cubic root of 72620057 is about 417.2075846924.

The spelling of 72620057 in words is "seventy-two million, six hundred twenty thousand, fifty-seven".