997729070 has 64 divisors (see below), whose sum is σ = 1967172480. Its totient is φ = 362147328.

The previous prime is 997729069. The next prime is 997729091. The reversal of 997729070 is 70927799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3601772 + ... + 3602048.

It is an arithmetic number, because the mean of its divisors is an integer number (30737070).

Almost surely, 2^997729070 is an apocalyptic number.

997729070 is a deficient number, since it is larger than the sum of its proper divisors (969443410).

997729070 is a wasteful number, since it uses less digits than its factorization.

997729070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 500094, while the sum is 50.

The square root of 997729070 is about 31586.8496371512. The cubic root of 997729070 is about 999.2424495956.

The spelling of 997729070 in words is "nine hundred ninety-seven million, seven hundred twenty-nine thousand, seventy".