1552402009 has 2 divisors, whose sum is σ = 1552402010. Its totient is φ = 1552402008.

The previous prime is 1552402003. The next prime is 1552402021. The reversal of 1552402009 is 9002042551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1533505600 + 18896409 = 39160^2 + 4347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552402009 - 2³ = 1552402001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1552402001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776201004 + 776201005.

It is an arithmetic number, because the mean of its divisors is an integer number (776201005).

Almost surely, 2^1552402009 is an apocalyptic number.

It is an amenable number.

1552402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552402009 is an equidigital number, since it uses as much as digits as its factorization.

1552402009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1552402009 is about 39400.5331055304. The cubic root of 1552402009 is about 1157.8920320268.

The spelling of 1552402009 in words is "one billion, five hundred fifty-two million, four hundred two thousand, nine".