740397886609 has 2 divisors, whose sum is σ = 740397886610. Its totient is φ = 740397886608.

The previous prime is 740397886607. The next prime is 740397886651. The reversal of 740397886609 is 906688793047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406984030209 + 333413856400 = 637953^2 + 577420^2 .

It is a cyclic number.

It is not a de Polignac number, because 740397886609 - 2¹ = 740397886607 is a prime.

Together with 740397886607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (740397886601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370198943304 + 370198943305.

It is an arithmetic number, because the mean of its divisors is an integer number (370198943305).

Almost surely, 2^740397886609 is an apocalyptic number.

It is an amenable number.

740397886609 is a deficient number, since it is larger than the sum of its proper divisors (1).

740397886609 is an equidigital number, since it uses as much as digits as its factorization.

740397886609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 740397886609 in words is "seven hundred forty billion, three hundred ninety-seven million, eight hundred eighty-six thousand, six hundred nine".