155661703 has 4 divisors (see below), whose sum is σ = 157985080. Its totient is φ = 153338328.

The previous prime is 155661683. The next prime is 155661713. The reversal of 155661703 is 307166551.

155661703 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155661703 - 2¹⁷ = 155530631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155661713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161588 + ... + 1161721.

It is an arithmetic number, because the mean of its divisors is an integer number (39496270).

Almost surely, 2^155661703 is an apocalyptic number.

155661703 is a deficient number, since it is larger than the sum of its proper divisors (2323377).

155661703 is an equidigital number, since it uses as much as digits as its factorization.

155661703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323376.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 155661703 is about 12476.4459282281. The cubic root of 155661703 is about 537.9318503802.

The spelling of 155661703 in words is "one hundred fifty-five million, six hundred sixty-one thousand, seven hundred three".