141778397 has 2 divisors, whose sum is σ = 141778398. Its totient is φ = 141778396.

The previous prime is 141778393. The next prime is 141778459. The reversal of 141778397 is 793877141.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98823481 + 42954916 = 9941^2 + 6554^2 .

It is a cyclic number.

It is not a de Polignac number, because 141778397 - 2² = 141778393 is a prime.

It is a super-2 number, since 2×141778397² = 40202227711779218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141778391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70889198 + 70889199.

It is an arithmetic number, because the mean of its divisors is an integer number (70889199).

Almost surely, 2^141778397 is an apocalyptic number.

It is an amenable number.

141778397 is a deficient number, since it is larger than the sum of its proper divisors (1).

141778397 is an equidigital number, since it uses as much as digits as its factorization.

141778397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 141778397 is about 11907.0734019741. The cubic root of 141778397 is about 521.4388123019.

The spelling of 141778397 in words is "one hundred forty-one million, seven hundred seventy-eight thousand, three hundred ninety-seven".