872637551 has 2 divisors, whose sum is σ = 872637552. Its totient is φ = 872637550.

The previous prime is 872637497. The next prime is 872637583. The reversal of 872637551 is 155736278.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872637551 is a prime.

It is a super-2 number, since 2×872637551² = 1522992590830555202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872637151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436318775 + 436318776.

It is an arithmetic number, because the mean of its divisors is an integer number (436318776).

Almost surely, 2^872637551 is an apocalyptic number.

872637551 is a deficient number, since it is larger than the sum of its proper divisors (1).

872637551 is an equidigital number, since it uses as much as digits as its factorization.

872637551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 872637551 is about 29540.4392485962. The cubic root of 872637551 is about 955.6040150689.

The spelling of 872637551 in words is "eight hundred seventy-two million, six hundred thirty-seven thousand, five hundred fifty-one".