72023477 has 4 divisors (see below), whose sum is σ = 72338220. Its totient is φ = 71708736.

The previous prime is 72023467. The next prime is 72023489. The reversal of 72023477 is 77432027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77432027 = 127 ⋅609701.

It can be written as a sum of positive squares in 2 ways, for example, as 49688401 + 22335076 = 7049^2 + 4726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72023477 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 (72023437) 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, 157028 + ... + 157485.

It is an arithmetic number, because the mean of its divisors is an integer number (18084555).

Almost surely, 2^72023477 is an apocalyptic number.

It is an amenable number.

72023477 is a deficient number, since it is larger than the sum of its proper divisors (314743).

72023477 is a wasteful number, since it uses less digits than its factorization.

72023477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314742.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 72023477 is about 8486.6646569780. The cubic root of 72023477 is about 416.0619764818.

The spelling of 72023477 in words is "seventy-two million, twenty-three thousand, four hundred seventy-seven".