725672639 has 2 divisors, whose sum is σ = 725672640. Its totient is φ = 725672638.

The previous prime is 725672599. The next prime is 725672641. The reversal of 725672639 is 936276527.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725672639 - 2²⁴ = 708895423 is a prime.

Together with 725672641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 725672593 and 725672602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725672039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362836319 + 362836320.

It is an arithmetic number, because the mean of its divisors is an integer number (362836320).

Almost surely, 2^725672639 is an apocalyptic number.

725672639 is a deficient number, since it is larger than the sum of its proper divisors (1).

725672639 is an equidigital number, since it uses as much as digits as its factorization.

725672639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 47.

The square root of 725672639 is about 26938.3117325492. The cubic root of 725672639 is about 898.6286270729.

The spelling of 725672639 in words is "seven hundred twenty-five million, six hundred seventy-two thousand, six hundred thirty-nine".