140137469 has 2 divisors, whose sum is σ = 140137470. Its totient is φ = 140137468.

The previous prime is 140137447. The next prime is 140137471. The reversal of 140137469 is 964731041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 40896025 = 9962^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 140137469 - 2¹² = 140133373 is a prime.

It is a super-2 number, since 2×140137469² = 39277020435451922, which contains 22 as substring.

Together with 140137471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140137429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70068734 + 70068735.

It is an arithmetic number, because the mean of its divisors is an integer number (70068735).

Almost surely, 2^140137469 is an apocalyptic number.

It is an amenable number.

140137469 is a deficient number, since it is larger than the sum of its proper divisors (1).

140137469 is an equidigital number, since it uses as much as digits as its factorization.

140137469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 140137469 is about 11837.9672663849. The cubic root of 140137469 is about 519.4193086291.

The spelling of 140137469 in words is "one hundred forty million, one hundred thirty-seven thousand, four hundred sixty-nine".