2574978397 has 2 divisors, whose sum is σ = 2574978398. Its totient is φ = 2574978396.

The previous prime is 2574978361. The next prime is 2574978437. The reversal of 2574978397 is 7938794752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1874370436 + 700607961 = 43294^2 + 26469^2 .

It is a cyclic number.

It is not a de Polignac number, because 2574978397 - 2¹⁵ = 2574945629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2574978997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1287489198 + 1287489199.

It is an arithmetic number, because the mean of its divisors is an integer number (1287489199).

Almost surely, 2^2574978397 is an apocalyptic number.

It is an amenable number.

2574978397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2574978397 is an equidigital number, since it uses as much as digits as its factorization.

2574978397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 61.

The square root of 2574978397 is about 50744.2449643307. The cubic root of 2574978397 is about 1370.6435602138.

The spelling of 2574978397 in words is "two billion, five hundred seventy-four million, nine hundred seventy-eight thousand, three hundred ninety-seven".