40449094397 has 2 divisors, whose sum is σ = 40449094398. Its totient is φ = 40449094396.

The previous prime is 40449094393. The next prime is 40449094429. The reversal of 40449094397 is 79349094404.

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., 29174689636 + 11274404761 = 170806^2 + 106181^2 .

It is a cyclic number.

It is not a de Polignac number, because 40449094397 - 2² = 40449094393 is a prime.

It is a super-2 number, since 2×40449094397² (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 (40449094391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20224547198 + 20224547199.

It is an arithmetic number, because the mean of its divisors is an integer number (20224547199).

Almost surely, 2^40449094397 is an apocalyptic number.

It is an amenable number.

40449094397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40449094397 is an equidigital number, since it uses as much as digits as its factorization.

40449094397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 40449094397 in words is "forty billion, four hundred forty-nine million, ninety-four thousand, three hundred ninety-seven".