742155977 has 4 divisors (see below), whose sum is σ = 742274436. Its totient is φ = 742037520.

The previous prime is 742155923. The next prime is 742156007. The reversal of 742155977 is 779551247.

742155977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167547136 + 574608841 = 12944^2 + 23971^2 .

It is a cyclic number.

It is not a de Polignac number, because 742155977 - 2⁶ = 742155913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742155677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49274 + ... + 62547.

It is an arithmetic number, because the mean of its divisors is an integer number (185568609).

Almost surely, 2^742155977 is an apocalyptic number.

It is an amenable number.

742155977 is a deficient number, since it is larger than the sum of its proper divisors (118459).

742155977 is a wasteful number, since it uses less digits than its factorization.

742155977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118458.

The product of its digits is 617400, while the sum is 47.

The square root of 742155977 is about 27242.5398412116. The cubic root of 742155977 is about 905.3817369458.

The spelling of 742155977 in words is "seven hundred forty-two million, one hundred fifty-five thousand, nine hundred seventy-seven".