140409797 has 8 divisors (see below), whose sum is σ = 153492192. Its totient is φ = 127380400.

The previous prime is 140409751. The next prime is 140409809. The reversal of 140409797 is 797904041.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 140409797 - 2¹⁶ = 140344261 is a prime.

It is a super-2 number, since 2×140409797² = 39429822187162418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140409197) 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, 7598 + ... + 18399.

It is an arithmetic number, because the mean of its divisors is an integer number (19186524).

Almost surely, 2^140409797 is an apocalyptic number.

It is an amenable number.

140409797 is a deficient number, since it is larger than the sum of its proper divisors (13082395).

140409797 is a wasteful number, since it uses less digits than its factorization.

140409797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26499.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 140409797 is about 11849.4639963165. The cubic root of 140409797 is about 519.7555520181.

The spelling of 140409797 in words is "one hundred forty million, four hundred nine thousand, seven hundred ninety-seven".