70278619 has 4 divisors (see below), whose sum is σ = 70329096. Its totient is φ = 70228144.

The previous prime is 70278613. The next prime is 70278623. The reversal of 70278619 is 91687207.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70278619 - 2⁷ = 70278491 is a prime.

It is a super-2 number, since 2×70278619² = 9878168577094322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70278613) 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, 23089 + ... + 25954.

It is an arithmetic number, because the mean of its divisors is an integer number (17582274).

Almost surely, 2^70278619 is an apocalyptic number.

70278619 is a deficient number, since it is larger than the sum of its proper divisors (50477).

70278619 is a wasteful number, since it uses less digits than its factorization.

70278619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50476.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 70278619 is about 8383.2343996813. The cubic root of 70278619 is about 412.6746005883.

The spelling of 70278619 in words is "seventy million, two hundred seventy-eight thousand, six hundred nineteen".