612701991 has 48 divisors (see below), whose sum is σ = 1032175872. Its totient is φ = 346473600.

The previous prime is 612701977. The next prime is 612702007. The reversal of 612701991 is 199107216.

It is not a de Polignac number, because 612701991 - 2⁷ = 612701863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612701491) 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 47 ways as a sum of consecutive naturals, for example, 90076 + ... + 96638.

It is an arithmetic number, because the mean of its divisors is an integer number (21503664).

Almost surely, 2^612701991 is an apocalyptic number.

612701991 is a deficient number, since it is larger than the sum of its proper divisors (419473881).

612701991 is a wasteful number, since it uses less digits than its factorization.

612701991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644 (or 6641 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 612701991 is about 24752.8178395915. The cubic root of 612701991 is about 849.3429713877.

The spelling of 612701991 in words is "six hundred twelve million, seven hundred one thousand, nine hundred ninety-one".