15121693 has 2 divisors, whose sum is σ = 15121694. Its totient is φ = 15121692.

The previous prime is 15121657. The next prime is 15121703. The reversal of 15121693 is 39612151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10614564 + 4507129 = 3258^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 15121693 - 2⁹ = 15121181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15121633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560846 + 7560847.

It is an arithmetic number, because the mean of its divisors is an integer number (7560847).

Almost surely, 2^15121693 is an apocalyptic number.

It is an amenable number.

15121693 is a deficient number, since it is larger than the sum of its proper divisors (1).

15121693 is an equidigital number, since it uses as much as digits as its factorization.

15121693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 15121693 is about 3888.6621092607. The cubic root of 15121693 is about 247.2863469245.

The spelling of 15121693 in words is "fifteen million, one hundred twenty-one thousand, six hundred ninety-three".