2042400403997 has 2 divisors, whose sum is σ = 2042400403998. Its totient is φ = 2042400403996.

The previous prime is 2042400403951. The next prime is 2042400404027. The reversal of 2042400403997 is 7993040042402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1258477868761 + 783922535236 = 1121819^2 + 885394^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042400403997 - 2⁶ = 2042400403933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2042400403097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021200201998 + 1021200201999.

It is an arithmetic number, because the mean of its divisors is an integer number (1021200201999).

Almost surely, 2^{2042400403997} is an apocalyptic number.

It is an amenable number.

2042400403997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042400403997 is an equidigital number, since it uses as much as digits as its factorization.

2042400403997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 2042400403997 in words is "two trillion, forty-two billion, four hundred million, four hundred three thousand, nine hundred ninety-seven".