1025408077 has 2 divisors, whose sum is σ = 1025408078. Its totient is φ = 1025408076.

The previous prime is 1025408063. The next prime is 1025408089. The reversal of 1025408077 is 7708045201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777628996 + 247779081 = 27886^2 + 15741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025408077 - 2⁷ = 1025407949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025408677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512704038 + 512704039.

It is an arithmetic number, because the mean of its divisors is an integer number (512704039).

Almost surely, 2^1025408077 is an apocalyptic number.

It is an amenable number.

1025408077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025408077 is an equidigital number, since it uses as much as digits as its factorization.

1025408077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 1025408077 is about 32021.9936449934. The cubic root of 1025408077 is about 1008.3986246333.

The spelling of 1025408077 in words is "one billion, twenty-five million, four hundred eight thousand, seventy-seven".