1238840497 has 8 divisors (see below), whose sum is σ = 1267465320. Its totient is φ = 1210410240.

The previous prime is 1238840483. The next prime is 1238840503. The reversal of 1238840497 is 7940488321.

It can be written as a sum of positive squares in 4 ways, for example, as 396447921 + 842392576 = 19911^2 + 29024^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1238840497 - 2¹¹ = 1238838449 is a prime.

It is a super-3 number, since 3×1238840497³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1238840417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35722 + ... + 61267.

It is an arithmetic number, because the mean of its divisors is an integer number (158433165).

Almost surely, 2^1238840497 is an apocalyptic number.

It is an amenable number.

1238840497 is a deficient number, since it is larger than the sum of its proper divisors (28624823).

1238840497 is an equidigital number, since it uses as much as digits as its factorization.

1238840497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97283.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 1238840497 is about 35197.1660364865. The cubic root of 1238840497 is about 1074.0021017590.

The spelling of 1238840497 in words is "one billion, two hundred thirty-eight million, eight hundred forty thousand, four hundred ninety-seven".