78090083 has 4 divisors (see below), whose sum is σ = 81485328. Its totient is φ = 74694840.

The previous prime is 78090079. The next prime is 78090101. The reversal of 78090083 is 38009087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38009087 = 23 ⋅1652569.

It is a cyclic number.

It is not a de Polignac number, because 78090083 - 2² = 78090079 is a prime.

It is a super-2 number, since 2×78090083² = 12196122125893778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78090013) 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, 1697588 + ... + 1697633.

It is an arithmetic number, because the mean of its divisors is an integer number (20371332).

Almost surely, 2^78090083 is an apocalyptic number.

78090083 is the 4724-th centered heptagonal number.

78090083 is a deficient number, since it is larger than the sum of its proper divisors (3395245).

78090083 is a wasteful number, since it uses less digits than its factorization.

78090083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395244.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 78090083 is about 8836.8593402860. The cubic root of 78090083 is about 427.4302894665.

The spelling of 78090083 in words is "seventy-eight million, ninety thousand, eighty-three".