39440773469 has 2 divisors, whose sum is σ = 39440773470. Its totient is φ = 39440773468.

The previous prime is 39440773453. The next prime is 39440773507. The reversal of 39440773469 is 96437704493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38332549369 + 1108224100 = 195787^2 + 33290^2 .

It is a cyclic number.

It is not a de Polignac number, because 39440773469 - 2⁴ = 39440773453 is a prime.

It is a super-2 number, since 2×39440773469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39440773429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19720386734 + 19720386735.

It is an arithmetic number, because the mean of its divisors is an integer number (19720386735).

Almost surely, 2^39440773469 is an apocalyptic number.

It is an amenable number.

39440773469 is a deficient number, since it is larger than the sum of its proper divisors (1).

39440773469 is an equidigital number, since it uses as much as digits as its factorization.

39440773469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 39440773469 in words is "thirty-nine billion, four hundred forty million, seven hundred seventy-three thousand, four hundred sixty-nine".