78373403 has 2 divisors, whose sum is σ = 78373404. Its totient is φ = 78373402.

The previous prime is 78373387. The next prime is 78373411. The reversal of 78373403 is 30437387.

It is a strong prime.

It is an emirp because it is prime and its reverse (30437387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78373403 - 2⁴ = 78373387 is a prime.

It is a super-2 number, since 2×78373403² = 12284780595600818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78373483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39186701 + 39186702.

It is an arithmetic number, because the mean of its divisors is an integer number (39186702).

Almost surely, 2^78373403 is an apocalyptic number.

78373403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78373403 is an equidigital number, since it uses as much as digits as its factorization.

78373403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 78373403 is about 8852.8754085890. The cubic root of 78373403 is about 427.9465880155.

The spelling of 78373403 in words is "seventy-eight million, three hundred seventy-three thousand, four hundred three".