390154481 has 2 divisors, whose sum is σ = 390154482. Its totient is φ = 390154480.

The previous prime is 390154477. The next prime is 390154489. The reversal of 390154481 is 184451093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380445025 + 9709456 = 19505^2 + 3116^2 .

It is an emirp because it is prime and its reverse (184451093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390154481 - 2² = 390154477 is a prime.

It is a super-2 number, since 2×390154481² = 304441038088758722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (390154489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195077240 + 195077241.

It is an arithmetic number, because the mean of its divisors is an integer number (195077241).

Almost surely, 2^390154481 is an apocalyptic number.

It is an amenable number.

390154481 is a deficient number, since it is larger than the sum of its proper divisors (1).

390154481 is an equidigital number, since it uses as much as digits as its factorization.

390154481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 390154481 is about 19752.3284956483. The cubic root of 390154481 is about 730.7108113700.

The spelling of 390154481 in words is "three hundred ninety million, one hundred fifty-four thousand, four hundred eighty-one".