147720977 has 2 divisors, whose sum is σ = 147720978. Its totient is φ = 147720976.

The previous prime is 147720959. The next prime is 147721027. The reversal of 147720977 is 779027741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146797456 + 923521 = 12116^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 147720977 - 2⁶ = 147720913 is a prime.

It is not a weakly prime, because it can be changed into another prime (147920977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73860488 + 73860489.

It is an arithmetic number, because the mean of its divisors is an integer number (73860489).

Almost surely, 2^147720977 is an apocalyptic number.

It is an amenable number.

147720977 is a deficient number, since it is larger than the sum of its proper divisors (1).

147720977 is an equidigital number, since it uses as much as digits as its factorization.

147720977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172872, while the sum is 44.

The square root of 147720977 is about 12154.0518758149. The cubic root of 147720977 is about 528.6246254540.

The spelling of 147720977 in words is "one hundred forty-seven million, seven hundred twenty thousand, nine hundred seventy-seven".