140397626 has 4 divisors (see below), whose sum is σ = 210596442. Its totient is φ = 70198812.

The previous prime is 140397619. The next prime is 140397637. The reversal of 140397626 is 626793041.

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

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 24512401 = 10765^2 + 4951^2 .

It is a super-2 number, since 2×140397626² = 39422986772871752, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 140397626.

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, 35099405 + ... + 35099408.

Almost surely, 2^140397626 is an apocalyptic number.

140397626 is a deficient number, since it is larger than the sum of its proper divisors (70198816).

140397626 is an equidigital number, since it uses as much as digits as its factorization.

140397626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70198815.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 140397626 is about 11848.9504176530. The cubic root of 140397626 is about 519.7405337697.

The spelling of 140397626 in words is "one hundred forty million, three hundred ninety-seven thousand, six hundred twenty-six".