625450129 has 2 divisors, whose sum is σ = 625450130. Its totient is φ = 625450128.

The previous prime is 625450127. The next prime is 625450139. The reversal of 625450129 is 921054526.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431683729 + 193766400 = 20777^2 + 13920^2 .

It is a cyclic number.

It is not a de Polignac number, because 625450129 - 2¹ = 625450127 is a prime.

It is a super-2 number, since 2×625450129² = 782375727732233282, which contains 22 as substring.

Together with 625450127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 625450094 and 625450103.

It is not a weakly prime, because it can be changed into another prime (625450127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312725064 + 312725065.

It is an arithmetic number, because the mean of its divisors is an integer number (312725065).

Almost surely, 2^625450129 is an apocalyptic number.

It is an amenable number.

625450129 is a deficient number, since it is larger than the sum of its proper divisors (1).

625450129 is an equidigital number, since it uses as much as digits as its factorization.

625450129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 625450129 is about 25009.0009596545. Note that the first 3 decimals coincide. The cubic root of 625450129 is about 855.1931800193.

The spelling of 625450129 in words is "six hundred twenty-five million, four hundred fifty thousand, one hundred twenty-nine".