78583951 has 2 divisors, whose sum is σ = 78583952. Its totient is φ = 78583950.

The previous prime is 78583949. The next prime is 78583957. The reversal of 78583951 is 15938587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78583951 - 2¹ = 78583949 is a prime.

Together with 78583949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78583957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39291975 + 39291976.

It is an arithmetic number, because the mean of its divisors is an integer number (39291976).

Almost surely, 2^78583951 is an apocalyptic number.

78583951 is a deficient number, since it is larger than the sum of its proper divisors (1).

78583951 is an equidigital number, since it uses as much as digits as its factorization.

78583951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 78583951 is about 8864.7589363727. The cubic root of 78583951 is about 428.3294676162.

The spelling of 78583951 in words is "seventy-eight million, five hundred eighty-three thousand, nine hundred fifty-one".