1023121997 has 2 divisors, whose sum is σ = 1023121998. Its totient is φ = 1023121996.

The previous prime is 1023121987. The next prime is 1023122027. The reversal of 1023121997 is 7991213201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760325476 + 262796521 = 27574^2 + 16211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023121907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511560998 + 511560999.

It is an arithmetic number, because the mean of its divisors is an integer number (511560999).

Almost surely, 2^1023121997 is an apocalyptic number.

It is an amenable number.

1023121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023121997 is an equidigital number, since it uses as much as digits as its factorization.

1023121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1023121997 is about 31986.2782611544. The cubic root of 1023121997 is about 1007.6486808593.

The spelling of 1023121997 in words is "one billion, twenty-three million, one hundred twenty-one thousand, nine hundred ninety-seven".