2576440397 has 2 divisors, whose sum is σ = 2576440398. Its totient is φ = 2576440396.

The previous prime is 2576440393. The next prime is 2576440439. The reversal of 2576440397 is 7930446752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2478944521 + 97495876 = 49789^2 + 9874^2 .

It is a cyclic number.

It is not a de Polignac number, because 2576440397 - 2² = 2576440393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2576440393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288220198 + 1288220199.

It is an arithmetic number, because the mean of its divisors is an integer number (1288220199).

Almost surely, 2^2576440397 is an apocalyptic number.

It is an amenable number.

2576440397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2576440397 is an equidigital number, since it uses as much as digits as its factorization.

2576440397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The square root of 2576440397 is about 50758.6484946162. The cubic root of 2576440397 is about 1370.9029153677.

The spelling of 2576440397 in words is "two billion, five hundred seventy-six million, four hundred forty thousand, three hundred ninety-seven".