1925378977 has 2 divisors, whose sum is σ = 1925378978. Its totient is φ = 1925378976.

The previous prime is 1925378951. The next prime is 1925379007. The reversal of 1925378977 is 7798735291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1742561536 + 182817441 = 41744^2 + 13521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1925378977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1925378677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962689488 + 962689489.

It is an arithmetic number, because the mean of its divisors is an integer number (962689489).

Almost surely, 2^1925378977 is an apocalyptic number.

It is an amenable number.

1925378977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925378977 is an equidigital number, since it uses as much as digits as its factorization.

1925378977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6667920, while the sum is 58.

The square root of 1925378977 is about 43879.1405681561. The cubic root of 1925378977 is about 1244.0525960141.

The spelling of 1925378977 in words is "one billion, nine hundred twenty-five million, three hundred seventy-eight thousand, nine hundred seventy-seven".