997619552 has 24 divisors (see below), whose sum is σ = 1977080112. Its totient is φ = 495504000.

The previous prime is 997619543. The next prime is 997619561. The reversal of 997619552 is 255916799.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (997619543) and next prime (997619561).

It is a junction number, because it is equal to n+sod(n) for n = 997619494 and 997619503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98399 + ... + 108062.

It is an arithmetic number, because the mean of its divisors is an integer number (82378338).

Almost surely, 2^997619552 is an apocalyptic number.

It is an amenable number.

997619552 is a deficient number, since it is larger than the sum of its proper divisors (979460560).

997619552 is a wasteful number, since it uses less digits than its factorization.

997619552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206622 (or 206614 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 53.

The square root of 997619552 is about 31585.1159883892. The cubic root of 997619552 is about 999.2058868846.

The spelling of 997619552 in words is "nine hundred ninety-seven million, six hundred nineteen thousand, five hundred fifty-two".