98278861 has 4 divisors (see below), whose sum is σ = 98321472. Its totient is φ = 98236252.

The previous prime is 98278847. The next prime is 98278877. The reversal of 98278861 is 16887289.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98278861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98278891) 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, 17635 + ... + 22528.

It is an arithmetic number, because the mean of its divisors is an integer number (24580368).

Almost surely, 2^98278861 is an apocalyptic number.

It is an amenable number.

98278861 is a deficient number, since it is larger than the sum of its proper divisors (42611).

98278861 is a wasteful number, since it uses less digits than its factorization.

98278861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42610.

The product of its digits is 387072, while the sum is 49.

The square root of 98278861 is about 9913.5695387686. The cubic root of 98278861 is about 461.4805180941.

The spelling of 98278861 in words is "ninety-eight million, two hundred seventy-eight thousand, eight hundred sixty-one".