72210923 has 2 divisors, whose sum is σ = 72210924. Its totient is φ = 72210922.

The previous prime is 72210911. The next prime is 72210949. The reversal of 72210923 is 32901227.

It is an a-pointer prime, because the next prime (72210949) can be obtained adding 72210923 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72210923 - 2²⁶ = 5102059 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 72210892 and 72210901.

It is not a weakly prime, because it can be changed into another prime (72210223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36105461 + 36105462.

It is an arithmetic number, because the mean of its divisors is an integer number (36105462).

Almost surely, 2^72210923 is an apocalyptic number.

72210923 is a deficient number, since it is larger than the sum of its proper divisors (1).

72210923 is an equidigital number, since it uses as much as digits as its factorization.

72210923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72210923 is about 8497.7010420466. The cubic root of 72210923 is about 416.4226070094.

It can be divided in two parts, 722 and 10923, that multiplied together give a triangular number (7886406 = T₃₉₇₁).

The spelling of 72210923 in words is "seventy-two million, two hundred ten thousand, nine hundred twenty-three".