612978377 has 12 divisors (see below), whose sum is σ = 683834928. Its totient is φ = 548928600.

The previous prime is 612978349. The next prime is 612978389. The reversal of 612978377 is 773879216.

It is not a de Polignac number, because 612978377 - 2²⁴ = 596201161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612978347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29699 + ... + 45912.

It is an arithmetic number, because the mean of its divisors is an integer number (56986244).

Almost surely, 2^612978377 is an apocalyptic number.

612978377 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

612978377 is a deficient number, since it is larger than the sum of its proper divisors (70856551).

612978377 is a wasteful number, since it uses less digits than its factorization.

612978377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75700 (or 75689 counting only the distinct ones).

The product of its digits is 889056, while the sum is 50.

The square root of 612978377 is about 24758.4001300569. The cubic root of 612978377 is about 849.4706632734.

The spelling of 612978377 in words is "six hundred twelve million, nine hundred seventy-eight thousand, three hundred seventy-seven".