118778749 has 2 divisors, whose sum is σ = 118778750. Its totient is φ = 118778748.

The previous prime is 118778719. The next prime is 118778753. The reversal of 118778749 is 947877811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83850649 + 34928100 = 9157^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 118778749 - 2⁹ = 118778237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118778696 and 118778705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118778719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59389374 + 59389375.

It is an arithmetic number, because the mean of its divisors is an integer number (59389375).

Almost surely, 2^118778749 is an apocalyptic number.

It is an amenable number.

118778749 is a deficient number, since it is larger than the sum of its proper divisors (1).

118778749 is an equidigital number, since it uses as much as digits as its factorization.

118778749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 52.

The square root of 118778749 is about 10898.5663736108. The cubic root of 118778749 is about 491.5634484974.

The spelling of 118778749 in words is "one hundred eighteen million, seven hundred seventy-eight thousand, seven hundred forty-nine".