731511073 has 2 divisors, whose sum is σ = 731511074. Its totient is φ = 731511072.

The previous prime is 731511041. The next prime is 731511101. The reversal of 731511073 is 370115137.

It is an a-pointer prime, because the next prime (731511101) can be obtained adding 731511073 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382867489 + 348643584 = 19567^2 + 18672^2 .

It is a cyclic number.

It is not a de Polignac number, because 731511073 - 2⁵ = 731511041 is a prime.

It is a super-2 number, since 2×731511073² = 1070216899843222658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731511023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365755536 + 365755537.

It is an arithmetic number, because the mean of its divisors is an integer number (365755537).

Almost surely, 2^731511073 is an apocalyptic number.

It is an amenable number.

731511073 is a deficient number, since it is larger than the sum of its proper divisors (1).

731511073 is an equidigital number, since it uses as much as digits as its factorization.

731511073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 28.

The square root of 731511073 is about 27046.4613766755. The cubic root of 731511073 is about 901.0321791511.

The spelling of 731511073 in words is "seven hundred thirty-one million, five hundred eleven thousand, seventy-three".