1490688977 has 2 divisors, whose sum is σ = 1490688978. Its totient is φ = 1490688976.

The previous prime is 1490688937. The next prime is 1490689021. The reversal of 1490688977 is 7798860941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172994001 + 317694976 = 34249^2 + 17824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490688977 - 2⁸ = 1490688721 is a prime.

It is a super-2 number, since 2×1490688977² = 4444307252298613058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1490688907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745344488 + 745344489.

It is an arithmetic number, because the mean of its divisors is an integer number (745344489).

Almost surely, 2^1490688977 is an apocalyptic number.

It is an amenable number.

1490688977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490688977 is an equidigital number, since it uses as much as digits as its factorization.

1490688977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 1490688977 is about 38609.4415525529. The cubic root of 1490688977 is about 1142.3407779748.

The spelling of 1490688977 in words is "one billion, four hundred ninety million, six hundred eighty-eight thousand, nine hundred seventy-seven".