122940691 has 2 divisors, whose sum is σ = 122940692. Its totient is φ = 122940690.

The previous prime is 122940667. The next prime is 122940707. The reversal of 122940691 is 196049221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122940691 - 2²¹ = 120843539 is a prime.

It is a super-2 number, since 2×122940691² = 30228827007114962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122940611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61470345 + 61470346.

It is an arithmetic number, because the mean of its divisors is an integer number (61470346).

Almost surely, 2^122940691 is an apocalyptic number.

122940691 is a deficient number, since it is larger than the sum of its proper divisors (1).

122940691 is an equidigital number, since it uses as much as digits as its factorization.

122940691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 122940691 is about 11087.8623277889. The cubic root of 122940691 is about 497.2390368942.

The spelling of 122940691 in words is "one hundred twenty-two million, nine hundred forty thousand, six hundred ninety-one".