122991830 has 16 divisors (see below), whose sum is σ = 238415184. Its totient is φ = 45412320.

The previous prime is 122991797. The next prime is 122991863. The reversal of 122991830 is 38199221.

It is an interprime number because it is at equal distance from previous prime (122991797) and next prime (122991863).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472916 + ... + 473175.

It is an arithmetic number, because the mean of its divisors is an integer number (14900949).

Almost surely, 2^122991830 is an apocalyptic number.

122991830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122991830 is a deficient number, since it is larger than the sum of its proper divisors (115423354).

122991830 is a wasteful number, since it uses less digits than its factorization.

122991830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946111.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 122991830 is about 11090.1681682470. The cubic root of 122991830 is about 497.3079719825.

The spelling of 122991830 in words is "one hundred twenty-two million, nine hundred ninety-one thousand, eight hundred thirty".