140997547 has 4 divisors (see below), whose sum is σ = 143102056. Its totient is φ = 138893040.

The previous prime is 140997539. The next prime is 140997553. The reversal of 140997547 is 745799041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745799041 = 13 ⋅57369157.

It is a cyclic number.

It is not a de Polignac number, because 140997547 - 2³ = 140997539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140997497 and 140997506.

It is not an unprimeable number, because it can be changed into a prime (140997587) 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, 1052154 + ... + 1052287.

It is an arithmetic number, because the mean of its divisors is an integer number (35775514).

Almost surely, 2^140997547 is an apocalyptic number.

140997547 is a deficient number, since it is larger than the sum of its proper divisors (2104509).

140997547 is an equidigital number, since it uses as much as digits as its factorization.

140997547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104508.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 140997547 is about 11874.2387966556. The cubic root of 140997547 is about 520.4797680139.

The spelling of 140997547 in words is "one hundred forty million, nine hundred ninety-seven thousand, five hundred forty-seven".