72406403 has 2 divisors, whose sum is σ = 72406404. Its totient is φ = 72406402.

The previous prime is 72406391. The next prime is 72406429. The reversal of 72406403 is 30460427.

It is a happy number.

It is an a-pointer prime, because the next prime (72406429) can be obtained adding 72406403 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72406403 - 2¹⁰ = 72405379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72406303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36203201 + 36203202.

It is an arithmetic number, because the mean of its divisors is an integer number (36203202).

Almost surely, 2^72406403 is an apocalyptic number.

72406403 is a deficient number, since it is larger than the sum of its proper divisors (1).

72406403 is an equidigital number, since it uses as much as digits as its factorization.

72406403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 72406403 is about 8509.1952028379. The cubic root of 72406403 is about 416.7980301182.

The spelling of 72406403 in words is "seventy-two million, four hundred six thousand, four hundred three".