978053699 has 4 divisors (see below), whose sum is σ = 1117775664. Its totient is φ = 838331736.

The previous prime is 978053653. The next prime is 978053711. The reversal of 978053699 is 996350879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 996350879 = 2381 ⋅418459.

It is a cyclic number.

It is not a de Polignac number, because 978053699 - 2¹² = 978049603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978053399) 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, 69860972 + ... + 69860985.

It is an arithmetic number, because the mean of its divisors is an integer number (279443916).

Almost surely, 2^978053699 is an apocalyptic number.

978053699 is a deficient number, since it is larger than the sum of its proper divisors (139721965).

978053699 is a wasteful number, since it uses less digits than its factorization.

978053699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139721964.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 978053699 is about 31273.8500827768. The cubic root of 978053699 is about 992.6303885782.

The spelling of 978053699 in words is "nine hundred seventy-eight million, fifty-three thousand, six hundred ninety-nine".