156011389 has 2 divisors, whose sum is σ = 156011390. Its totient is φ = 156011388.

The previous prime is 156011311. The next prime is 156011411. The reversal of 156011389 is 983110651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79798489 + 76212900 = 8933^2 + 8730^2 .

It is an emirp because it is prime and its reverse (983110651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156011389 - 2¹⁷ = 155880317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156011689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78005694 + 78005695.

It is an arithmetic number, because the mean of its divisors is an integer number (78005695).

Almost surely, 2^156011389 is an apocalyptic number.

It is an amenable number.

156011389 is a deficient number, since it is larger than the sum of its proper divisors (1).

156011389 is an equidigital number, since it uses as much as digits as its factorization.

156011389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 156011389 is about 12490.4519133617. The cubic root of 156011389 is about 538.3343611909.

The spelling of 156011389 in words is "one hundred fifty-six million, eleven thousand, three hundred eighty-nine".