140545549 has 2 divisors, whose sum is σ = 140545550. Its totient is φ = 140545548.

The previous prime is 140545523. The next prime is 140545567. The reversal of 140545549 is 945545041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82937449 + 57608100 = 9107^2 + 7590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140545549 is a prime.

It is a super-2 number, since 2×140545549² = 39506102687422802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140545519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70272774 + 70272775.

It is an arithmetic number, because the mean of its divisors is an integer number (70272775).

Almost surely, 2^140545549 is an apocalyptic number.

It is an amenable number.

140545549 is a deficient number, since it is larger than the sum of its proper divisors (1).

140545549 is an equidigital number, since it uses as much as digits as its factorization.

140545549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 140545549 is about 11855.1908040318. The cubic root of 140545549 is about 519.9230026527.

The spelling of 140545549 in words is "one hundred forty million, five hundred forty-five thousand, five hundred forty-nine".