140191990 has 8 divisors (see below), whose sum is σ = 252345600. Its totient is φ = 56076792.

The previous prime is 140191967. The next prime is 140191993. The reversal of 140191990 is 99191041.

It is a happy number.

140191990 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140191993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7009590 + ... + 7009609.

It is an arithmetic number, because the mean of its divisors is an integer number (31543200).

Almost surely, 2^140191990 is an apocalyptic number.

140191990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140191990 is a deficient number, since it is larger than the sum of its proper divisors (112153610).

140191990 is a wasteful number, since it uses less digits than its factorization.

140191990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019206.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 140191990 is about 11840.2698448980. The cubic root of 140191990 is about 519.4866605623.

The spelling of 140191990 in words is "one hundred forty million, one hundred ninety-one thousand, nine hundred ninety".