97904278 has 4 divisors (see below), whose sum is σ = 146856420. Its totient is φ = 48952138.

The previous prime is 97904273. The next prime is 97904297. The reversal of 97904278 is 87240979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87240979 = 7 ⋅12462997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97904273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24476068 + ... + 24476071.

It is an arithmetic number, because the mean of its divisors is an integer number (36714105).

Almost surely, 2^97904278 is an apocalyptic number.

97904278 is a deficient number, since it is larger than the sum of its proper divisors (48952142).

97904278 is a wasteful number, since it uses less digits than its factorization.

97904278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48952141.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 97904278 is about 9894.6590643640. The cubic root of 97904278 is about 460.8934714004.

The spelling of 97904278 in words is "ninety-seven million, nine hundred four thousand, two hundred seventy-eight".