152121493 has 2 divisors, whose sum is σ = 152121494. Its totient is φ = 152121492.

The previous prime is 152121481. The next prime is 152121503. The reversal of 152121493 is 394121251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81595089 + 70526404 = 9033^2 + 8398^2 .

It is a cyclic number.

It is not a de Polignac number, because 152121493 - 2¹³ = 152113301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152124493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76060746 + 76060747.

It is an arithmetic number, because the mean of its divisors is an integer number (76060747).

Almost surely, 2^152121493 is an apocalyptic number.

It is an amenable number.

152121493 is a deficient number, since it is larger than the sum of its proper divisors (1).

152121493 is an equidigital number, since it uses as much as digits as its factorization.

152121493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 152121493 is about 12333.7542135394. The cubic root of 152121493 is about 533.8224814043.

The spelling of 152121493 in words is "one hundred fifty-two million, one hundred twenty-one thousand, four hundred ninety-three".