743278073 has 2 divisors, whose sum is σ = 743278074. Its totient is φ = 743278072.

The previous prime is 743278009. The next prime is 743278079. The reversal of 743278073 is 370872347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376670464 + 366607609 = 19408^2 + 19147^2 .

It is a cyclic number.

It is not a de Polignac number, because 743278073 - 2⁶ = 743278009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 743278073.

It is not a weakly prime, because it can be changed into another prime (743278079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371639036 + 371639037.

It is an arithmetic number, because the mean of its divisors is an integer number (371639037).

Almost surely, 2^743278073 is an apocalyptic number.

It is an amenable number.

743278073 is a deficient number, since it is larger than the sum of its proper divisors (1).

743278073 is an equidigital number, since it uses as much as digits as its factorization.

743278073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 743278073 is about 27263.1266181999. The cubic root of 743278073 is about 905.8378017446.

The spelling of 743278073 in words is "seven hundred forty-three million, two hundred seventy-eight thousand, seventy-three".