740172289 has 2 divisors, whose sum is σ = 740172290. Its totient is φ = 740172288.

The previous prime is 740172283. The next prime is 740172343. The reversal of 740172289 is 982271047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529690225 + 210482064 = 23015^2 + 14508^2 .

It is an emirp because it is prime and its reverse (982271047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 740172289 - 2¹⁹ = 739648001 is a prime.

It is not a weakly prime, because it can be changed into another prime (740172283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370086144 + 370086145.

It is an arithmetic number, because the mean of its divisors is an integer number (370086145).

Almost surely, 2^740172289 is an apocalyptic number.

It is an amenable number.

740172289 is a deficient number, since it is larger than the sum of its proper divisors (1).

740172289 is an equidigital number, since it uses as much as digits as its factorization.

740172289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 740172289 is about 27206.1075679708. The cubic root of 740172289 is about 904.5743606539.

The spelling of 740172289 in words is "seven hundred forty million, one hundred seventy-two thousand, two hundred eighty-nine".