121952613 has 4 divisors (see below), whose sum is σ = 162603488. Its totient is φ = 81301740.

The previous prime is 121952609. The next prime is 121952641. The reversal of 121952613 is 316259121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 316259121 = 3 ⋅105419707.

It is not a de Polignac number, because 121952613 - 2² = 121952609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121952683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20325433 + ... + 20325438.

It is an arithmetic number, because the mean of its divisors is an integer number (40650872).

Almost surely, 2^121952613 is an apocalyptic number.

It is an amenable number.

121952613 is a deficient number, since it is larger than the sum of its proper divisors (40650875).

121952613 is an equidigital number, since it uses as much as digits as its factorization.

121952613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40650874.

The product of its digits is 3240, while the sum is 30.

The square root of 121952613 is about 11043.2157001482. The cubic root of 121952613 is about 495.9033438196.

The spelling of 121952613 in words is "one hundred twenty-one million, nine hundred fifty-two thousand, six hundred thirteen".