153949 has 2 divisors, whose sum is σ = 153950. Its totient is φ = 153948.

The previous prime is 153947. The next prime is 153953. The reversal of 153949 is 949351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152100 + 1849 = 390^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 153949 - 2¹ = 153947 is a prime.

Together with 153947, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 153949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76974 + 76975.

It is an arithmetic number, because the mean of its divisors is an integer number (76975).

2¹⁵³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

153949 is a deficient number, since it is larger than the sum of its proper divisors (1).

153949 is an equidigital number, since it uses as much as digits as its factorization.

153949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 153949 is about 392.3633520093. The cubic root of 153949 is about 53.5951664536.

The spelling of 153949 in words is "one hundred fifty-three thousand, nine hundred forty-nine".