135703978 has 4 divisors (see below), whose sum is σ = 203555970. Its totient is φ = 67851988.

The previous prime is 135703969. The next prime is 135703987. The reversal of 135703978 is 879307531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (135703969) and next prime (135703987).

It can be written as a sum of positive squares in only one way, i.e., 120626289 + 15077689 = 10983^2 + 3883^2 .

It is an unprimeable number.

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, 33925993 + ... + 33925996.

Almost surely, 2^135703978 is an apocalyptic number.

135703978 is a deficient number, since it is larger than the sum of its proper divisors (67851992).

135703978 is an equidigital number, since it uses as much as digits as its factorization.

135703978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67851991.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 135703978 is about 11649.2050372547. The cubic root of 135703978 is about 513.8829314454.

The spelling of 135703978 in words is "one hundred thirty-five million, seven hundred three thousand, nine hundred seventy-eight".