98942978 has 4 divisors (see below), whose sum is σ = 148414470. Its totient is φ = 49471488.

The previous prime is 98942971. The next prime is 98942981. The reversal of 98942978 is 87924989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87924989 = 19 ⋅4627631.

It can be written as a sum of positive squares in only one way, i.e., 98942809 + 169 = 9947^2 + 13^2 .

It is not an unprimeable number, because it can be changed into a prime (98942971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24735743 + ... + 24735746.

Almost surely, 2^98942978 is an apocalyptic number.

98942978 is a deficient number, since it is larger than the sum of its proper divisors (49471492).

98942978 is a wasteful number, since it uses less digits than its factorization.

98942978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49471491.

The product of its digits is 2612736, while the sum is 56.

The square root of 98942978 is about 9947.0084950200. The cubic root of 98942978 is about 462.5176665275.

The spelling of 98942978 in words is "ninety-eight million, nine hundred forty-two thousand, nine hundred seventy-eight".