25977739 has 2 divisors, whose sum is σ = 25977740. Its totient is φ = 25977738.

The previous prime is 25977727. The next prime is 25977761. The reversal of 25977739 is 93777952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25977739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25977692 and 25977701.

It is not a weakly prime, because it can be changed into another prime (25977439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12988869 + 12988870.

It is an arithmetic number, because the mean of its divisors is an integer number (12988870).

Almost surely, 2^25977739 is an apocalyptic number.

25977739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25977739 is an equidigital number, since it uses as much as digits as its factorization.

25977739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 49.

The square root of 25977739 is about 5096.8361755112. The cubic root of 25977739 is about 296.1650338210.

The spelling of 25977739 in words is "twenty-five million, nine hundred seventy-seven thousand, seven hundred thirty-nine".