145542779 has 2 divisors, whose sum is σ = 145542780. Its totient is φ = 145542778.

The previous prime is 145542739. The next prime is 145542833. The reversal of 145542779 is 977245541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145542779 - 2²⁴ = 128765563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145542739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72771389 + 72771390.

It is an arithmetic number, because the mean of its divisors is an integer number (72771390).

Almost surely, 2^145542779 is an apocalyptic number.

145542779 is a deficient number, since it is larger than the sum of its proper divisors (1).

145542779 is an equidigital number, since it uses as much as digits as its factorization.

145542779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 145542779 is about 12064.1111980950. Note that the first 4 decimals coincide. The cubic root of 145542779 is about 526.0134967887.

The spelling of 145542779 in words is "one hundred forty-five million, five hundred forty-two thousand, seven hundred seventy-nine".