97042779 has 12 divisors (see below), whose sum is σ = 145364856. Its totient is φ = 64695024.

The previous prime is 97042763. The next prime is 97042807. The reversal of 97042779 is 97724079.

It is a happy number.

It is not a de Polignac number, because 97042779 - 2⁴ = 97042763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97042739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199434 + ... + 199919.

It is an arithmetic number, because the mean of its divisors is an integer number (12113738).

Almost surely, 2^97042779 is an apocalyptic number.

97042779 is a deficient number, since it is larger than the sum of its proper divisors (48322077).

97042779 is an equidigital number, since it uses as much as digits as its factorization.

97042779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399368 (or 399356 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 97042779 is about 9851.0293370795. The cubic root of 97042779 is about 459.5376245545.

The spelling of 97042779 in words is "ninety-seven million, forty-two thousand, seven hundred seventy-nine".