140306973 has 4 divisors (see below), whose sum is σ = 187075968. Its totient is φ = 93537980.

The previous prime is 140306941. The next prime is 140306989. The reversal of 140306973 is 379603041.

140306973 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140306973 - 2⁵ = 140306941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140306993) 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, 23384493 + ... + 23384498.

It is an arithmetic number, because the mean of its divisors is an integer number (46768992).

Almost surely, 2^140306973 is an apocalyptic number.

It is an amenable number.

140306973 is a deficient number, since it is larger than the sum of its proper divisors (46768995).

140306973 is an equidigital number, since it uses as much as digits as its factorization.

140306973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46768994.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 140306973 is about 11845.1244400386. The cubic root of 140306973 is about 519.6286463532.

The spelling of 140306973 in words is "one hundred forty million, three hundred six thousand, nine hundred seventy-three".