156420629 has 2 divisors, whose sum is σ = 156420630. Its totient is φ = 156420628.

The previous prime is 156420613. The next prime is 156420659. The reversal of 156420629 is 926024651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 16826404 = 11815^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 156420629 - 2⁴ = 156420613 is a prime.

It is a super-3 number, since 3×156420629³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156420659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78210314 + 78210315.

It is an arithmetic number, because the mean of its divisors is an integer number (78210315).

Almost surely, 2^156420629 is an apocalyptic number.

It is an amenable number.

156420629 is a deficient number, since it is larger than the sum of its proper divisors (1).

156420629 is an equidigital number, since it uses as much as digits as its factorization.

156420629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 156420629 is about 12506.8232977043. The cubic root of 156420629 is about 538.8046593373.

The spelling of 156420629 in words is "one hundred fifty-six million, four hundred twenty thousand, six hundred twenty-nine".