78377051 has 4 divisors (see below), whose sum is σ = 78397704. Its totient is φ = 78356400.

The previous prime is 78377029. The next prime is 78377087. The reversal of 78377051 is 15077387.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78377051 is a prime.

It is a super-2 number, since 2×78377051² = 12285924246913202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78376996 and 78377014.

It is not an unprimeable number, because it can be changed into a prime (78377251) 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, 2810 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (19599426).

Almost surely, 2^78377051 is an apocalyptic number.

78377051 is a deficient number, since it is larger than the sum of its proper divisors (20653).

78377051 is a wasteful number, since it uses less digits than its factorization.

78377051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 78377051 is about 8853.0814409447. The cubic root of 78377051 is about 427.9532277040.

The spelling of 78377051 in words is "seventy-eight million, three hundred seventy-seven thousand, fifty-one".