79861403 has 2 divisors, whose sum is σ = 79861404. Its totient is φ = 79861402.

The previous prime is 79861381. The next prime is 79861409. The reversal of 79861403 is 30416897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79861403 - 2⁶ = 79861339 is a prime.

It is not a weakly prime, because it can be changed into another prime (79861409) 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 as a sum of consecutive naturals, namely, 39930701 + 39930702.

It is an arithmetic number, because the mean of its divisors is an integer number (39930702).

Almost surely, 2^79861403 is an apocalyptic number.

79861403 is a deficient number, since it is larger than the sum of its proper divisors (1).

79861403 is an equidigital number, since it uses as much as digits as its factorization.

79861403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 79861403 is about 8936.5207435556. The cubic root of 79861403 is about 430.6379623500.

The spelling of 79861403 in words is "seventy-nine million, eight hundred sixty-one thousand, four hundred three".