140988394 has 4 divisors (see below), whose sum is σ = 211482594. Its totient is φ = 70494196.

The previous prime is 140988383. The next prime is 140988439. The reversal of 140988394 is 493889041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493889041 = 397 ⋅1244053.

It can be written as a sum of positive squares in only one way, i.e., 100500625 + 40487769 = 10025^2 + 6363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35247097 + ... + 35247100.

Almost surely, 2^140988394 is an apocalyptic number.

140988394 is a deficient number, since it is larger than the sum of its proper divisors (70494200).

140988394 is an equidigital number, since it uses as much as digits as its factorization.

140988394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70494199.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 140988394 is about 11873.8533762212. The cubic root of 140988394 is about 520.4685052780.

The spelling of 140988394 in words is "one hundred forty million, nine hundred eighty-eight thousand, three hundred ninety-four".