146938681 has 2 divisors, whose sum is σ = 146938682. Its totient is φ = 146938680.

The previous prime is 146938669. The next prime is 146938699. The reversal of 146938681 is 186839641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 67568400 = 8909^2 + 8220^2 .

It is a cyclic number.

It is not a de Polignac number, because 146938681 - 2¹³ = 146930489 is a prime.

It is a super-2 number, since 2×146938681² = 43181951948039522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (146938601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73469340 + 73469341.

It is an arithmetic number, because the mean of its divisors is an integer number (73469341).

Almost surely, 2^146938681 is an apocalyptic number.

It is an amenable number.

146938681 is a deficient number, since it is larger than the sum of its proper divisors (1).

146938681 is an equidigital number, since it uses as much as digits as its factorization.

146938681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 146938681 is about 12121.8266362789. The cubic root of 146938681 is about 527.6898155636.

The spelling of 146938681 in words is "one hundred forty-six million, nine hundred thirty-eight thousand, six hundred eighty-one".