723813551 has 2 divisors, whose sum is σ = 723813552. Its totient is φ = 723813550.

The previous prime is 723813521. The next prime is 723813553. The reversal of 723813551 is 155318327.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723813551 is a prime.

It is a super-2 number, since 2×723813551² = 1047812113222459202, which contains 22 as substring.

Together with 723813553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723813553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361906775 + 361906776.

It is an arithmetic number, because the mean of its divisors is an integer number (361906776).

Almost surely, 2^723813551 is an apocalyptic number.

723813551 is a deficient number, since it is larger than the sum of its proper divisors (1).

723813551 is an equidigital number, since it uses as much as digits as its factorization.

723813551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 723813551 is about 26903.7832098016. The cubic root of 723813551 is about 897.8605771775.

The spelling of 723813551 in words is "seven hundred twenty-three million, eight hundred thirteen thousand, five hundred fifty-one".