2078377397 has 2 divisors, whose sum is σ = 2078377398. Its totient is φ = 2078377396.

The previous prime is 2078377373. The next prime is 2078377409. The reversal of 2078377397 is 7937738702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1314352516 + 764024881 = 36254^2 + 27641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2078377397 - 2⁶ = 2078377333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2078377337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039188698 + 1039188699.

It is an arithmetic number, because the mean of its divisors is an integer number (1039188699).

Almost surely, 2^2078377397 is an apocalyptic number.

It is an amenable number.

2078377397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078377397 is an equidigital number, since it uses as much as digits as its factorization.

2078377397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3111696, while the sum is 53.

The square root of 2078377397 is about 45589.2245711637. The cubic root of 2078377397 is about 1276.1688416708.

The spelling of 2078377397 in words is "two billion, seventy-eight million, three hundred seventy-seven thousand, three hundred ninety-seven".