1397001975 has 24 divisors (see below), whose sum is σ = 2312209152. Its totient is φ = 744261600.

The previous prime is 1397001973. The next prime is 1397001989. The reversal of 1397001975 is 5791007931.

It is not a de Polignac number, because 1397001975 - 2¹ = 1397001973 is a prime.

It is a super-2 number, since 2×1397001975² = 3903229036307801250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397001973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63234 + ... + 82416.

It is an arithmetic number, because the mean of its divisors is an integer number (96342048).

Almost surely, 2^1397001975 is an apocalyptic number.

1397001975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1397001975 is a deficient number, since it is larger than the sum of its proper divisors (915207177).

1397001975 is a wasteful number, since it uses less digits than its factorization.

1397001975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20167 (or 20162 counting only the distinct ones).

The product of its (nonzero) digits is 59535, while the sum is 42.

The square root of 1397001975 is about 37376.4896024225. The cubic root of 1397001975 is about 1117.8898339140.

The spelling of 1397001975 in words is "one billion, three hundred ninety-seven million, one thousand, nine hundred seventy-five".