290978739 has 12 divisors (see below), whose sum is σ = 429245856. Its totient is φ = 189858192.

The previous prime is 290978731. The next prime is 290978747. The reversal of 290978739 is 937879092.

It is an interprime number because it is at equal distance from previous prime (290978731) and next prime (290978747).

It is not a de Polignac number, because 290978739 - 2³ = 290978731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (290978731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343524 + ... + 344369.

It is an arithmetic number, because the mean of its divisors is an integer number (35770488).

Almost surely, 2^290978739 is an apocalyptic number.

290978739 is a deficient number, since it is larger than the sum of its proper divisors (138267117).

290978739 is a wasteful number, since it uses less digits than its factorization.

290978739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687946 (or 687943 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 290978739 is about 17058.0989269027. The cubic root of 290978739 is about 662.6543997082.

The spelling of 290978739 in words is "two hundred ninety million, nine hundred seventy-eight thousand, seven hundred thirty-nine".