140918397 has 8 divisors (see below), whose sum is σ = 190465344. Its totient is φ = 92658528.

The previous prime is 140918387. The next prime is 140918429. The reversal of 140918397 is 793819041.

It is a happy number.

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

It is not a de Polignac number, because 140918397 - 2⁴ = 140918381 is a prime.

It is a super-2 number, since 2×140918397² = 39715989226099218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140918347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321513 + ... + 321950.

It is an arithmetic number, because the mean of its divisors is an integer number (23808168).

Almost surely, 2^140918397 is an apocalyptic number.

It is an amenable number.

140918397 is a deficient number, since it is larger than the sum of its proper divisors (49546947).

140918397 is an equidigital number, since it uses as much as digits as its factorization.

140918397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643539.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 140918397 is about 11870.9054835762. The cubic root of 140918397 is about 520.3823580815.

The spelling of 140918397 in words is "one hundred forty million, nine hundred eighteen thousand, three hundred ninety-seven".