78153373 has 2 divisors, whose sum is σ = 78153374. Its totient is φ = 78153372.

The previous prime is 78153371. The next prime is 78153407. The reversal of 78153373 is 37335187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45400644 + 32752729 = 6738^2 + 5723^2 .

It is a cyclic number.

It is not a de Polignac number, because 78153373 - 2¹ = 78153371 is a prime.

It is a super-2 number, since 2×78153373² = 12215899422554258, which contains 22 as substring.

Together with 78153371, 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 (78153371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39076686 + 39076687.

It is an arithmetic number, because the mean of its divisors is an integer number (39076687).

Almost surely, 2^78153373 is an apocalyptic number.

It is an amenable number.

78153373 is a deficient number, since it is larger than the sum of its proper divisors (1).

78153373 is an equidigital number, since it uses as much as digits as its factorization.

78153373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 78153373 is about 8840.4396383890. The cubic root of 78153373 is about 427.5457320295.

The spelling of 78153373 in words is "seventy-eight million, one hundred fifty-three thousand, three hundred seventy-three".