155240983 has 2 divisors, whose sum is σ = 155240984. Its totient is φ = 155240982.

The previous prime is 155240971. The next prime is 155240993. The reversal of 155240983 is 389042551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155240983 - 2⁵ = 155240951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155240903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77620491 + 77620492.

It is an arithmetic number, because the mean of its divisors is an integer number (77620492).

Almost surely, 2^155240983 is an apocalyptic number.

155240983 is a deficient number, since it is larger than the sum of its proper divisors (1).

155240983 is an equidigital number, since it uses as much as digits as its factorization.

155240983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 155240983 is about 12459.5739493772. The cubic root of 155240983 is about 537.4467751876.

The spelling of 155240983 in words is "one hundred fifty-five million, two hundred forty thousand, nine hundred eighty-three".