140634986 has 4 divisors (see below), whose sum is σ = 210952482. Its totient is φ = 70317492.

The previous prime is 140634971. The next prime is 140635013. The reversal of 140634986 is 689436041.

140634986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689436041 = 7 ⋅98490863.

It can be written as a sum of positive squares in only one way, i.e., 101384761 + 39250225 = 10069^2 + 6265^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35158745 + ... + 35158748.

Almost surely, 2^140634986 is an apocalyptic number.

140634986 is a deficient number, since it is larger than the sum of its proper divisors (70317496).

140634986 is an equidigital number, since it uses as much as digits as its factorization.

140634986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70317495.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 140634986 is about 11858.9622648864. The cubic root of 140634986 is about 520.0332646373.

The spelling of 140634986 in words is "one hundred forty million, six hundred thirty-four thousand, nine hundred eighty-six".