1974122397 has 24 divisors (see below), whose sum is σ = 3076983000. Its totient is φ = 1212421248.

The previous prime is 1974122347. The next prime is 1974122419. The reversal of 1974122397 is 7932214791.

It can be written as a sum of positive squares in 4 ways, for example, as 881555481 + 1092566916 = 29691^2 + 33054^2 .

It is not a de Polignac number, because 1974122397 - 2²³ = 1965733789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974122327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42979 + ... + 76127.

It is an arithmetic number, because the mean of its divisors is an integer number (128207625).

Almost surely, 2^1974122397 is an apocalyptic number.

It is an amenable number.

1974122397 is a deficient number, since it is larger than the sum of its proper divisors (1102860603).

1974122397 is a wasteful number, since it uses less digits than its factorization.

1974122397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33677 (or 33674 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1974122397 is about 44431.0971842920. The cubic root of 1974122397 is about 1254.4634875458.

It can be divided in two parts, 197412 and 2397, that added together give a square (199809 = 447²).

The spelling of 1974122397 in words is "one billion, nine hundred seventy-four million, one hundred twenty-two thousand, three hundred ninety-seven".