147705623 has 4 divisors (see below), whose sum is σ = 159067608. Its totient is φ = 136343640.

The previous prime is 147705617. The next prime is 147705629. The reversal of 147705623 is 326507741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326507741 = 7 ⋅46643963.

It is an interprime number because it is at equal distance from previous prime (147705617) and next prime (147705629).

It is a cyclic number.

It is not a de Polignac number, because 147705623 - 2¹⁸ = 147443479 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 (147705629) 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, 5680973 + ... + 5680998.

It is an arithmetic number, because the mean of its divisors is an integer number (39766902).

Almost surely, 2^147705623 is an apocalyptic number.

147705623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

147705623 is a deficient number, since it is larger than the sum of its proper divisors (11361985).

147705623 is a wasteful number, since it uses less digits than its factorization.

147705623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11361984.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 147705623 is about 12153.4202181937. The cubic root of 147705623 is about 528.6063098794.

The spelling of 147705623 in words is "one hundred forty-seven million, seven hundred five thousand, six hundred twenty-three".