78397701 has 16 divisors (see below), whose sum is σ = 108364800. Its totient is φ = 50355648.

The previous prime is 78397687. The next prime is 78397721. The reversal of 78397701 is 10779387.

It is a happy number.

It is not a de Polignac number, because 78397701 - 2⁷ = 78397573 is a prime.

It is a super-2 number, since 2×78397701² = 12292399044170802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78397721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71580 + ... + 72666.

It is an arithmetic number, because the mean of its divisors is an integer number (6772800).

Almost surely, 2^78397701 is an apocalyptic number.

It is an amenable number.

78397701 is a deficient number, since it is larger than the sum of its proper divisors (29967099).

78397701 is a wasteful number, since it uses less digits than its factorization.

78397701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 78397701 is about 8854.2476247279. The cubic root of 78397701 is about 427.9908086797.

The spelling of 78397701 in words is "seventy-eight million, three hundred ninety-seven thousand, seven hundred one".