72687403 has 2 divisors, whose sum is σ = 72687404. Its totient is φ = 72687402.

The previous prime is 72687397. The next prime is 72687431. The reversal of 72687403 is 30478627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72687403 - 2⁵ = 72687371 is a prime.

It is not a weakly prime, because it can be changed into another prime (72687463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36343701 + 36343702.

It is an arithmetic number, because the mean of its divisors is an integer number (36343702).

Almost surely, 2^72687403 is an apocalyptic number.

72687403 is a deficient number, since it is larger than the sum of its proper divisors (1).

72687403 is an equidigital number, since it uses as much as digits as its factorization.

72687403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 72687403 is about 8525.6907638032. The cubic root of 72687403 is about 417.3365140913.

The spelling of 72687403 in words is "seventy-two million, six hundred eighty-seven thousand, four hundred three".