1958398079 has 16 divisors (see below), whose sum is σ = 2273632416. Its totient is φ = 1667097600.

The previous prime is 1958398067. The next prime is 1958398093. The reversal of 1958398079 is 9708938591.

It is a cyclic number.

It is not a de Polignac number, because 1958398079 - 2⁸ = 1958397823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958391079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10259 + ... + 63419.

It is an arithmetic number, because the mean of its divisors is an integer number (142102026).

Almost surely, 2^1958398079 is an apocalyptic number.

1958398079 is a deficient number, since it is larger than the sum of its proper divisors (315234337).

1958398079 is a wasteful number, since it uses less digits than its factorization.

1958398079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53386.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The square root of 1958398079 is about 44253.7916906563. The cubic root of 1958398079 is about 1251.1239126734.

The spelling of 1958398079 in words is "one billion, nine hundred fifty-eight million, three hundred ninety-eight thousand, seventy-nine".