123940817970 has 32 divisors (see below), whose sum is σ = 302499627840. Its totient is φ = 32490699840.

The previous prime is 123940817951. The next prime is 123940817977. The reversal of 123940817970 is 79718049321.

It is a super-2 number, since 2×123940817970² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123940817977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35009761 + ... + 35013300.

It is an arithmetic number, because the mean of its divisors is an integer number (9453113370).

Almost surely, 2^123940817970 is an apocalyptic number.

123940817970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123940817970 is an abundant number, since it is smaller than the sum of its proper divisors (178558809870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123940817970 is a wasteful number, since it uses less digits than its factorization.

123940817970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70023130.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 123940817970 in words is "one hundred twenty-three billion, nine hundred forty million, eight hundred seventeen thousand, nine hundred seventy".