135747979 has 2 divisors, whose sum is σ = 135747980. Its totient is φ = 135747978.

The previous prime is 135747973. The next prime is 135748003. The reversal of 135747979 is 979747531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135747979 - 2³ = 135747971 is a prime.

It is not a weakly prime, because it can be changed into another prime (135747971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67873989 + 67873990.

It is an arithmetic number, because the mean of its divisors is an integer number (67873990).

Almost surely, 2^135747979 is an apocalyptic number.

135747979 is a deficient number, since it is larger than the sum of its proper divisors (1).

135747979 is an equidigital number, since it uses as much as digits as its factorization.

135747979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 135747979 is about 11651.0934679969. The cubic root of 135747979 is about 513.9384663427.

The spelling of 135747979 in words is "one hundred thirty-five million, seven hundred forty-seven thousand, nine hundred seventy-nine".