78701631 has 8 divisors (see below), whose sum is σ = 104984880. Its totient is φ = 52443072.

The previous prime is 78701611. The next prime is 78701633. The reversal of 78701631 is 13610787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78701631 - 2⁷ = 78701503 is a prime.

It is a super-2 number, since 2×78701631² = 12387893444120322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78701592 and 78701601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78701633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3381 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (13123110).

Almost surely, 2^78701631 is an apocalyptic number.

78701631 is a deficient number, since it is larger than the sum of its proper divisors (26283249).

78701631 is a wasteful number, since it uses less digits than its factorization.

78701631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 78701631 is about 8871.3939716372. The cubic root of 78701631 is about 428.5431697399.

The spelling of 78701631 in words is "seventy-eight million, seven hundred one thousand, six hundred thirty-one".