396240003997 has 2 divisors, whose sum is σ = 396240003998. Its totient is φ = 396240003996.

The previous prime is 396240003979. The next prime is 396240004067. The reversal of 396240003997 is 799300042693.

Together with previous prime (396240003979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360743183161 + 35496820836 = 600619^2 + 188406^2 .

It is a cyclic number.

It is not a de Polignac number, because 396240003997 - 2²⁷ = 396105786269 is a prime.

It is a super-2 number, since 2×396240003997² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396240003947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198120001998 + 198120001999.

It is an arithmetic number, because the mean of its divisors is an integer number (198120001999).

Almost surely, 2^396240003997 is an apocalyptic number.

It is an amenable number.

396240003997 is a deficient number, since it is larger than the sum of its proper divisors (1).

396240003997 is an equidigital number, since it uses as much as digits as its factorization.

396240003997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 396240003997 in words is "three hundred ninety-six billion, two hundred forty million, three thousand, nine hundred ninety-seven".