72419557 has 4 divisors (see below), whose sum is σ = 82765216. Its totient is φ = 62073900.

The previous prime is 72419533. The next prime is 72419561. The reversal of 72419557 is 75591427.

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: 75591427 = 73 ⋅1035499.

It is not a de Polignac number, because 72419557 - 2¹¹ = 72417509 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 (72419587) 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, 5172819 + ... + 5172832.

It is an arithmetic number, because the mean of its divisors is an integer number (20691304).

Almost surely, 2^72419557 is an apocalyptic number.

It is an amenable number.

72419557 is a deficient number, since it is larger than the sum of its proper divisors (10345659).

72419557 is a wasteful number, since it uses less digits than its factorization.

72419557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10345658.

The product of its digits is 88200, while the sum is 40.

The square root of 72419557 is about 8509.9680962974. The cubic root of 72419557 is about 416.8232683526.

The spelling of 72419557 in words is "seventy-two million, four hundred nineteen thousand, five hundred fifty-seven".