72030137 has 4 divisors (see below), whose sum is σ = 72432720. Its totient is φ = 71627556.

The previous prime is 72030131. The next prime is 72030149. The reversal of 72030137 is 73103027.

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: 73103027 = 743 ⋅98389.

It is a cyclic number.

It is not a de Polignac number, because 72030137 - 2⁶ = 72030073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72030131) 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, 201023 + ... + 201380.

It is an arithmetic number, because the mean of its divisors is an integer number (18108180).

Almost surely, 2^72030137 is an apocalyptic number.

It is an amenable number.

72030137 is a deficient number, since it is larger than the sum of its proper divisors (402583).

72030137 is a wasteful number, since it uses less digits than its factorization.

72030137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402582.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 72030137 is about 8487.0570282048. The cubic root of 72030137 is about 416.0748004825.

The spelling of 72030137 in words is "seventy-two million, thirty thousand, one hundred thirty-seven".