78103573 has 2 divisors, whose sum is σ = 78103574. Its totient is φ = 78103572.

The previous prime is 78103567. The next prime is 78103639. The reversal of 78103573 is 37530187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60109009 + 17994564 = 7753^2 + 4242^2 .

It is a cyclic number.

It is not a de Polignac number, because 78103573 - 2⁵ = 78103541 is a prime.

It is a super-2 number, since 2×78103573² = 12200336230732658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78103513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39051786 + 39051787.

It is an arithmetic number, because the mean of its divisors is an integer number (39051787).

Almost surely, 2^78103573 is an apocalyptic number.

It is an amenable number.

78103573 is a deficient number, since it is larger than the sum of its proper divisors (1).

78103573 is an equidigital number, since it uses as much as digits as its factorization.

78103573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 78103573 is about 8837.6225875515. The cubic root of 78103573 is about 427.4549007974.

The spelling of 78103573 in words is "seventy-eight million, one hundred three thousand, five hundred seventy-three".