723740987 has 2 divisors, whose sum is σ = 723740988. Its totient is φ = 723740986.

The previous prime is 723740971. The next prime is 723740999. The reversal of 723740987 is 789047327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 723740987 - 2⁴ = 723740971 is a prime.

It is a super-3 number, since 3×723740987³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (723740587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361870493 + 361870494.

It is an arithmetic number, because the mean of its divisors is an integer number (361870494).

Almost surely, 2^723740987 is an apocalyptic number.

723740987 is a deficient number, since it is larger than the sum of its proper divisors (1).

723740987 is an equidigital number, since it uses as much as digits as its factorization.

723740987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 723740987 is about 26902.4345924305. The cubic root of 723740987 is about 897.8305719678.

The spelling of 723740987 in words is "seven hundred twenty-three million, seven hundred forty thousand, nine hundred eighty-seven".