278457083 has 2 divisors, whose sum is σ = 278457084. Its totient is φ = 278457082.

The previous prime is 278457077. The next prime is 278457133. The reversal of 278457083 is 380754872.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278457083 - 2⁶ = 278457019 is a prime.

It is not a weakly prime, because it can be changed into another prime (278457073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139228541 + 139228542.

It is an arithmetic number, because the mean of its divisors is an integer number (139228542).

Almost surely, 2^278457083 is an apocalyptic number.

278457083 is a deficient number, since it is larger than the sum of its proper divisors (1).

278457083 is an equidigital number, since it uses as much as digits as its factorization.

278457083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 278457083 is about 16687.0333792439. The cubic root of 278457083 is about 653.0093852205.

The spelling of 278457083 in words is "two hundred seventy-eight million, four hundred fifty-seven thousand, eighty-three".