1625133971 has 2 divisors, whose sum is σ = 1625133972. Its totient is φ = 1625133970.

The previous prime is 1625133893. The next prime is 1625133997. The reversal of 1625133971 is 1793315261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1625133971 - 2²² = 1620939667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625103971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812566985 + 812566986.

It is an arithmetic number, because the mean of its divisors is an integer number (812566986).

Almost surely, 2^1625133971 is an apocalyptic number.

1625133971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625133971 is an equidigital number, since it uses as much as digits as its factorization.

1625133971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 1625133971 is about 40312.9504129876. The cubic root of 1625133971 is about 1175.6996517581.

The spelling of 1625133971 in words is "one billion, six hundred twenty-five million, one hundred thirty-three thousand, nine hundred seventy-one".