720240403 has 2 divisors, whose sum is σ = 720240404. Its totient is φ = 720240402.

The previous prime is 720240397. The next prime is 720240457. The reversal of 720240403 is 304042027.

It is a weak prime.

It is an emirp because it is prime and its reverse (304042027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720240403 - 2²⁹ = 183369491 is a prime.

It is a super-2 number, since 2×720240403² = 1037492476227204818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720240463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360120201 + 360120202.

It is an arithmetic number, because the mean of its divisors is an integer number (360120202).

Almost surely, 2^720240403 is an apocalyptic number.

720240403 is a deficient number, since it is larger than the sum of its proper divisors (1).

720240403 is an equidigital number, since it uses as much as digits as its factorization.

720240403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 720240403 is about 26837.2950015459. The cubic root of 720240403 is about 896.3806922060.

The spelling of 720240403 in words is "seven hundred twenty million, two hundred forty thousand, four hundred three".