155401723 has 2 divisors, whose sum is σ = 155401724. Its totient is φ = 155401722.

The previous prime is 155401681. The next prime is 155401733. The reversal of 155401723 is 327104551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155401723 is a prime.

It is a super-2 number, since 2×155401723² = 48299391022737458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155401691 and 155401700.

It is not a weakly prime, because it can be changed into another prime (155401733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77700861 + 77700862.

It is an arithmetic number, because the mean of its divisors is an integer number (77700862).

Almost surely, 2^155401723 is an apocalyptic number.

155401723 is a deficient number, since it is larger than the sum of its proper divisors (1).

155401723 is an equidigital number, since it uses as much as digits as its factorization.

155401723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 155401723 is about 12466.0227418371. The cubic root of 155401723 is about 537.6322060227.

The spelling of 155401723 in words is "one hundred fifty-five million, four hundred one thousand, seven hundred twenty-three".