1397101969 has 2 divisors, whose sum is σ = 1397101970. Its totient is φ = 1397101968.

The previous prime is 1397101967. The next prime is 1397101997. The reversal of 1397101969 is 9691017931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269140625 + 127961344 = 35625^2 + 11312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397101969 - 2¹ = 1397101967 is a prime.

It is a super-2 number, since 2×1397101969² = 3903787823567353922, which contains 22 as substring.

Together with 1397101967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1397101967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698550984 + 698550985.

It is an arithmetic number, because the mean of its divisors is an integer number (698550985).

Almost surely, 2^1397101969 is an apocalyptic number.

It is an amenable number.

1397101969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397101969 is an equidigital number, since it uses as much as digits as its factorization.

1397101969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 1397101969 is about 37377.8272375482. The cubic root of 1397101969 is about 1117.9165052218.

The spelling of 1397101969 in words is "one billion, three hundred ninety-seven million, one hundred one thousand, nine hundred sixty-nine".