121723507 has 2 divisors, whose sum is σ = 121723508. Its totient is φ = 121723506.

The previous prime is 121723477. The next prime is 121723603. The reversal of 121723507 is 705327121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121723507 - 2⁷ = 121723379 is a prime.

It is a super-2 number, since 2×121723507² = 29633224312758098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121723207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60861753 + 60861754.

It is an arithmetic number, because the mean of its divisors is an integer number (60861754).

Almost surely, 2^121723507 is an apocalyptic number.

121723507 is a deficient number, since it is larger than the sum of its proper divisors (1).

121723507 is an equidigital number, since it uses as much as digits as its factorization.

121723507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 121723507 is about 11032.8376676175. The cubic root of 121723507 is about 495.5926065854.

The spelling of 121723507 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, five hundred seven".