72487901 has 2 divisors, whose sum is σ = 72487902. Its totient is φ = 72487900.

The previous prime is 72487897. The next prime is 72487979. The reversal of 72487901 is 10978427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 220900 = 8501^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 72487901 - 2² = 72487897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72487601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36243950 + 36243951.

It is an arithmetic number, because the mean of its divisors is an integer number (36243951).

Almost surely, 2^72487901 is an apocalyptic number.

It is an amenable number.

72487901 is a deficient number, since it is larger than the sum of its proper divisors (1).

72487901 is an equidigital number, since it uses as much as digits as its factorization.

72487901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 72487901 is about 8513.9826755755. The cubic root of 72487901 is about 416.9543490253.

The spelling of 72487901 in words is "seventy-two million, four hundred eighty-seven thousand, nine hundred one".