239981501 has 2 divisors, whose sum is σ = 239981502. Its totient is φ = 239981500.

The previous prime is 239981479. The next prime is 239981507. The reversal of 239981501 is 105189932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210279001 + 29702500 = 14501^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 239981501 - 2⁶ = 239981437 is a prime.

It is a super-2 number, since 2×239981501² = 115182241644426002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239981507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119990750 + 119990751.

It is an arithmetic number, because the mean of its divisors is an integer number (119990751).

Almost surely, 2^239981501 is an apocalyptic number.

It is an amenable number.

239981501 is a deficient number, since it is larger than the sum of its proper divisors (1).

239981501 is an equidigital number, since it uses as much as digits as its factorization.

239981501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 239981501 is about 15491.3363206665. The cubic root of 239981501 is about 621.4305339210.

The spelling of 239981501 in words is "two hundred thirty-nine million, nine hundred eighty-one thousand, five hundred one".