145661279 has 2 divisors, whose sum is σ = 145661280. Its totient is φ = 145661278.

The previous prime is 145661251. The next prime is 145661293. The reversal of 145661279 is 972166541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145661279 - 2¹⁶ = 145595743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145661249) 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, 72830639 + 72830640.

It is an arithmetic number, because the mean of its divisors is an integer number (72830640).

Almost surely, 2^145661279 is an apocalyptic number.

145661279 is a deficient number, since it is larger than the sum of its proper divisors (1).

145661279 is an equidigital number, since it uses as much as digits as its factorization.

145661279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 145661279 is about 12069.0214599196. The cubic root of 145661279 is about 526.1562170036.

The spelling of 145661279 in words is "one hundred forty-five million, six hundred sixty-one thousand, two hundred seventy-nine".