78199461 has 6 divisors (see below), whose sum is σ = 112954790. Its totient is φ = 52132968.

The previous prime is 78199447. The next prime is 78199469. The reversal of 78199461 is 16499187.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 35034561 = 6570^2 + 5919^2 .

It is not a de Polignac number, because 78199461 - 2⁹ = 78198949 is a prime.

It is a super-2 number, since 2×78199461² = 12230311401381042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78199469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4344406 + ... + 4344423.

Almost surely, 2^78199461 is an apocalyptic number.

It is an amenable number.

78199461 is a deficient number, since it is larger than the sum of its proper divisors (34755329).

78199461 is a wasteful number, since it uses less digits than its factorization.

78199461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688835 (or 8688832 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 78199461 is about 8843.0459119016. The cubic root of 78199461 is about 427.6297584971.

The spelling of 78199461 in words is "seventy-eight million, one hundred ninety-nine thousand, four hundred sixty-one".