740038991 has 2 divisors, whose sum is σ = 740038992. Its totient is φ = 740038990.

The previous prime is 740038979. The next prime is 740039009. The reversal of 740038991 is 199830047.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (199830047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 740038991 - 2⁶ = 740038927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740038931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370019495 + 370019496.

It is an arithmetic number, because the mean of its divisors is an integer number (370019496).

Almost surely, 2^740038991 is an apocalyptic number.

740038991 is a deficient number, since it is larger than the sum of its proper divisors (1).

740038991 is an equidigital number, since it uses as much as digits as its factorization.

740038991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 740038991 is about 27203.6576768640. The cubic root of 740038991 is about 904.5200556432.

The spelling of 740038991 in words is "seven hundred forty million, thirty-eight thousand, nine hundred ninety-one".