1497653021 has 2 divisors, whose sum is σ = 1497653022. Its totient is φ = 1497653020.

The previous prime is 1497653011. The next prime is 1497653111. The reversal of 1497653021 is 1203567941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031308996 + 466344025 = 32114^2 + 21595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1497653021 - 2¹⁸ = 1497390877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1497653011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748826510 + 748826511.

It is an arithmetic number, because the mean of its divisors is an integer number (748826511).

Almost surely, 2^1497653021 is an apocalyptic number.

It is an amenable number.

1497653021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497653021 is an equidigital number, since it uses as much as digits as its factorization.

1497653021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1497653021 is about 38699.5222321930. The cubic root of 1497653021 is about 1144.1169041718.

The spelling of 1497653021 in words is "one billion, four hundred ninety-seven million, six hundred fifty-three thousand, twenty-one".