78464101 has 4 divisors (see below), whose sum is σ = 78561900. Its totient is φ = 78366304.

The previous prime is 78464081. The next prime is 78464107. The reversal of 78464101 is 10146487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10146487 = 13 ⋅780499.

It can be written as a sum of positive squares in 2 ways, for example, as 52911076 + 25553025 = 7274^2 + 5055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78464101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78464107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47686 + ... + 49303.

It is an arithmetic number, because the mean of its divisors is an integer number (19640475).

Almost surely, 2^78464101 is an apocalyptic number.

It is an amenable number.

78464101 is a deficient number, since it is larger than the sum of its proper divisors (97799).

78464101 is an equidigital number, since it uses as much as digits as its factorization.

78464101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97798.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78464101 is about 8857.9964438918. The cubic root of 78464101 is about 428.1116054630. Note that the first 3 decimals are identical.

The spelling of 78464101 in words is "seventy-eight million, four hundred sixty-four thousand, one hundred one".