1490169481 has 2 divisors, whose sum is σ = 1490169482. Its totient is φ = 1490169480.

The previous prime is 1490169407. The next prime is 1490169491. The reversal of 1490169481 is 1849610941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788767225 + 701402256 = 28085^2 + 26484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1490169481 is a prime.

It is a super-2 number, since 2×1490169481² = 4441210164207618722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1490169491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745084740 + 745084741.

It is an arithmetic number, because the mean of its divisors is an integer number (745084741).

Almost surely, 2^1490169481 is an apocalyptic number.

It is an amenable number.

1490169481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490169481 is an equidigital number, since it uses as much as digits as its factorization.

1490169481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1490169481 is about 38602.7133890870. The cubic root of 1490169481 is about 1142.2080629631.

The spelling of 1490169481 in words is "one billion, four hundred ninety million, one hundred sixty-nine thousand, four hundred eighty-one".